24. heinäkuuta 2021

National Un-Moth Week?

This almost was the week that “wasn’t”. I can’t remember a time when I set aside a calendar week for a specific effort (National Moth Week) and soooo many things got in the way. The multitude of hurdles that Everyday Life presented from July 17-24 has been a bit overwhelming, especially for someone like myself who is admittedly poor at multi-tasking. Some of the hurdles were self-imposed (e.g. scheduling non-mothing social events in the evenings—What was I thinking?) and others were out of the blue. The most tragic was that just as NMW began, my beloved Canon SX620 IS point-and-hope camera decided to die. The sensors went haywire and it could no longer figure out what I meant to focus on or what settings to use. I have a couple of inferior back-up cameras which filled the gap, but in the end, I had to place an emergency camera order online—and of course the new hardware won’t arrive until after the end of National Moth Week.

Mother Nature didn’t cooperate fully either. We reeeally can’t complain here in CenTex when we’re having a July with below average temps (up until today) and above average rainfall. That’s all wonderful. But a couple of evenings of NMW were lost due to disruptive thunderstorms. Yeah, I know, “Woe is us.” One ill-timed bolt of lightning caused a very brief power outage at my house; my computer had to restart and then my photo editing software decided it had to check its entire library of 125,000 images for errors. Seven hours later, it finally announced that everything was OK and I could continue editing.

The organizers of NMW need to look more carefully at the lunar calendar. This past night, at the climax of NMW, we had a bright full moon. Rule number one in mothing, from fundamental moth behavior, is that nights with a full moon will end up with poor results at artificial lights. Note To NMW Organizers: Look at the lunar calendar for 2022 and figure out when the New Moon (i.e. no moon) will be in July! That should be your target week.

Here in CenTex with it’s high biodiversity, a really good night of mothing in optimal conditions in Spring or Fall might result in the documentation of something on the order of 100 to 150 species of moths. This past week, in several evenings and mornings of effort over seven calendar days, I may have about 55 species of moths to upload. That might seem high by some standards—Sorry, you folks at more northern latitudes—but by Texas standards, that’s rather pitiful.

In the end, I just have to laugh it all off and assert, “Wait ’til next year!”

Lähetetty 24. heinäkuuta 2021 20:11 käyttäjältä gcwarbler gcwarbler | 22 havaintoa | 3 kommenttia | Jätä kommentti

3. heinäkuuta 2021

Notice of Intent: A Checklist of the Moths of Central Texas

I wanted to let several iNaturalists know that I have started on a long-ago conceived project of compiling a “Checklist of the Moths of Central Texas”. For many years, those of us attempting to study and identify moths in the general Austin region have had the use of some excellent resources such as the latest edition(s) of Knudson & Bordelon’s Texas Checklist (latest: 2018), along with access to online resources such as iNaturalist, BugGuide, Moth Photographer’s Group, and certain other useful databases.

With the passing of the co-founders of the Texas Lepidoptera Survey, Ed Knudson and Charles Bordelon, in the past few years, we have all been left somewhat rudderless in the vast sea of moths since they are no longer able to personally confirm IDs. Their checklists are rapidly becoming out-of-date from taxonomic changes, and fresh copies of their excellent regional publications are, for the time being, unavailable. Texas is not without entomological expertise, but Lepidopteran studies certainly suffered a major setback with the loss of these two gentlemen. It is my understanding that a book on the Moths of Texas is in preparation, carrying on work initiated by the late John Tveten, but I am unaware of the status of that manuscript or any timeline for its publication.

The abovementioned online resources offer us considerable help in identifying moths and understanding their distribution, but zeroing in on the fauna of any region smaller than Texas as a whole is tedious. It is not difficult to search any of the above resources for county records and lists, but county-level data is often a bit too fine-focused (small scale) to guide research. Compromises between a statewide list and county lists might involve looking at the moth fauna of an ecoregion such as the Edwards Plateau, a strategy which would have a strong ecological foundation as a basis for a faunal association. That said, at least three aspects of geography make that a difficult target: (1) each of the ecoregions of Texas has a great many counties subsumed in them, (2) the ecoregional boundaries do not handily align with political boundaries (which are more readily available for database searches, etc.), and (3) those of us living in the major urban centers such as Austin are likely to encounter moths from two or more ecoregions because our cities of residence are commonly on major bioecological boundaries.

As an ad hoc solution to the search for a basis of a regional moth checklist, I have settled on a large metropolitan boundary defined in various resources as the Greater Austin region. This coincides with the following seven counties including and surrounding the Austin metropolitan area: Bastrop, Blanco, Burnet, Caldwell, Hays, Travis, and Williamson. The immediate advantage of a polygon encompassing this region is that it coincides by definition with the outer boundaries of this set of counties and already has an established, georeferenced “Place” in the iNaturalist database. It also coincides with the region used for Austin’s participation in the annual City Nature Challenge on iNaturalist which typically adds massive numbers of Lepidopteran records annually to that database. It also has the practical advantage of encompassing a large portion of the local destinations we Austin-area moth-ers commonly visit and study. And finally, it has that advantage of straddling a major bioecological transition area which allows for the compilation of representative moth faunas from each side of such a boundary—probably not a comprehensive fauna of either ecoregion, but a strong sampling of each.

Among the resources I am tapping to compile a raw checklist are the following:

— I downloaded all Lepidoptera records from the “Greater Austin, TX” place on iNaturalist (roughly 130,000 records, of which about 76,000 are moth observations). Here’s a link to all these observations:

— I have at my disposal a spreadsheet compiled by the late Jim Gillaspy (Univ. of Texas) which goes by the misnomer “BFL LepList” refering to Brackenridge Field Laboratory of the University of Texas. In fact, it is a compilation of thousands of moth specimens collected by Gillaspy not only at BFL but also other central Texas locations (e.g. Pedernales Falls SP and Univ. of Texas’ Stengl Ranch in Bastrop County) along with many other separate collecting efforts around Texas the specimens from which are now deposited in the University of Texas Insect Collection (UTIC). That list was prepared in the 1990s and last updated in about 2000. Moth taxonomy has changed substantially since Gillaspy’s compilation but the spreadsheet has many advantages: (1) Most moth specimen identifications were provided en masse by Ed Knudson; (2) the spreadsheet contains separate lists for each location; and (3) its taxonomic sequence was orgainized by Hodges numbers (although these too are now somewhat out of date).

— Records on BugGuide and Moth Photographer’s Group maps will be used to check against eventual lists derived from the above databases.

— Visits to the UTIC will probably be on the agenda in the future to verify particular records and identifications (to the extent that I am able to).

I anticipate that the final product of a checklist will be made available online and in print form. I can only hope it might become the precursor to a proper "Field Guide" to our moth fauna with illustrations, descriptions, identification tips, etc. That'll take another day or two. ;-)

I am not unaware that this will be a long, involved task to get to anything resembling a useful up-to-date checklist. Updating the taxonomy of Gillaspy’s list and cleaning up the identifications of tens of thousands of iNaturalist observations will be among the initial tasks.

This journal post is both a notification of my efforts on this project but also a solicitation for help. At times, for various tasks, I am sure I will need multiple sets of eyes looking over various draft or interim products. I'm asking now if you might be available for smaller or larger subtasks along this undoubtedly tortuous path to a Central Texas Moth Checklist. You're welcome to message me privately with your interest and thoughts. I’m also interested to hear if any of you has ever attempted a similar compilation in any way (home, local, county, etc.) and might care to relate your experiences with such an effort.

Wish me luck. I’ll look forward to hearing any initial thoughts on this quixotic adventure.

Lähetetty 3. heinäkuuta 2021 21:40 käyttäjältä gcwarbler gcwarbler | 16 kommenttia | Jätä kommentti

25. kesäkuuta 2021

Open call for Greg Lasley video tributes

Each October, Travis Audubon Society honors an individual who has made an extraordinary contribution to promoting environmental conservation, education, or advocacy at the annual Conservation Award Celebration, named after legendary birder and conservationist Victor Emanuel.

The Board of Directors of Travis Audubon is honored to announce that the 2021 Conservation Hero is Greg Lasley of Dripping Springs, Texas. The Board unanimously agreed that no one is more qualified for this award than Lasley, who accepted the honor before his death on January 30, 2021. Lasley will be honored posthumously at the virtual 12th annual Victor Emanuel Conservation Award Celebration on October 8, 2021.

As part of the virtual program, we would like to showcase Greg's impact on friends and fellow naturalists all over the world with personal stories.

If you are interested in sharing a tribute to Greg, please use this Google Form to upload a less-than-one-minute video file using one of these prompts:

  • A lesson Greg taught me is…
  • My favorite memory of Greg is…
  • Greg’s legacy to conservation is…
    Submissions will close on Friday, August 20, 2021.

If you have questions about the event or video submissions, please email Development Manager Kelsey McKenna at Kelsey@travisaudubon.org

Lähetetty 25. kesäkuuta 2021 03:13 käyttäjältä gcwarbler gcwarbler | 2 kommenttia | Jätä kommentti

20. kesäkuuta 2021

Latest Petrophila Moth Research Published

I’m happy to report that my latest research on Petrophila moths has just been published in the Journal of Lepidopterists’ Society: “Identification and Distribution of the Petrophila fulicalis species group (Crambidae): Taking Advantage of Citizen Science Data”, J. Lep. Soc. 75(2):113-127 (June 2021).

This is the latest effort coming out of my interest in this genus and previously highlighted in these journal articles:

https://www.inaturalist.org/posts/40151-sorting-out-feather-edged-and-heppner-s-petrophila (Sept 2020)
https://www.inaturalist.org/posts/39051-another-a-hah-moment-with-petrophila-moths (Aug 2020)
https://www.inaturalist.org/posts/27047-id-guide-6-notes-on-texas-petrophila-identification (Aug 2019)
https://www.inaturalist.org/posts/27037-id-guide-5-petrophila-research (Aug 2019)

iNaturalist plays a prominent role in my published article and several iNaturalists contributed important photos for it. Below, I’m going to tag a lot of the people I need to thank for helping bring this article to fruition.

A downloadable pdf of the above article is available from my page on ResearchGate.com (Chuck Sexton) and can also be accessed from this DropBox folder, along with full-sized versions of the figures and maps:
(I hope I set up this DropBox link correctly. Let me know if you can't access it.)

Lähetetty 20. kesäkuuta 2021 12:30 käyttäjältä gcwarbler gcwarbler | 17 kommenttia | Jätä kommentti

10. kesäkuuta 2021

Hypoprepia lichen moths: What a mess!

Based on occasional questions and queries about certain species of the lichen moth genus Hypoprepia (Erebidae: Arctiinae), I did some quick research on uploaded images on iNaturalist. I focused on the biggest long-standing problem which is trying to distinguish Painted Lichen Moth (H. fucosa) and Scarlet-winged Lichen Moths (H. miniata). A few things are for sure:

— The separation of these two species is very difficult, particularly in Texas.
— The older literature and newer field guides dreadfully oversimplify this ID challenge.
— The patterns of wing and thorax coloration vary in complex ways geographically.
— Thus far, barcoding analysis has not helped to separate the two species (Palting et al, 2018).

In the literature and field guides, we read that the way to ID each of these species is boiled down to this:
Scarlet-winged Lichen Moth has the ground color of the forewings all red, wide black terminal band on hindwings, and an all red thorax.
Painted Lichen Moth has substantial yellow/orange in the basal 2/3 of the forewings, narrower black terminal band on the hindwings, and a dark gray spot in the middle of the thorax.

There are other details mentioned occasionally in the literature (like Scarlet-winged have a black terminal abdominal segment), and the hindwings of course are not visible in the vast majority of field photos. That said, these statements provide a classic example of the danger of oversimplified field marks. Apparently NOT ONE of the suggested field marks is true all the time or everywhere. Not even close. There are major exceptions to each aspect across the range of each species, not just the occasional aberrant individual.

I’m still working on sorting through all the images and trying to pin down any additional visible/measurable characters that might help with this ID. That work is ongoing, but I wanted to address one of the above marks—the gray spot on the thorax—because it illustrates the complexity of the situation. So here’s what I did today:

I examined all H. fucosa and H. miniata images uploaded to iNat as of 8 June 2021 and which have been identified to species level. Because of the great uncertainty in this set of species and because misidentifications are probably abundant, I made the ultra-conservative starting assumption that I would take ALL identifications at face value—not necessarily accepting them, but just taking them as a starting point for this particular analysis. I did not go through and add/change any IDs prior to this compilation; hopefully, additional research might allow me or someone else to do that. It isn’t appropriate or possible at present.

Then, I compiled the number of observations of moths (usually one per observation) that showed a gray spot or line in the center of the thorax. Note: This “field mark” is highly variable; the gray spot varies in width from a wide square/rectangle to just a thin streak of gray down the center of the thorax. IF there was ANY gray, I counted it as a gray spot. Another note: Something not described in any literature or guides is that the gray spot is typically situated in the middle of a yellowish thoracic disk which is paler than the flanking reddish tegulae (sides of the thorax). In many populations, as the gray spot narrows and disappears, many individuals appear to have just a yellowish center to the thorax which contrasts only slightly with the reddish tegulae (see two examples from Missouri, below). I counted these as “no gray spot” although I think this is part of a continuous phenotypic range of variation. Yet there are many, many Hypoprepia’s (apparently of both species) with true, immaculate, uniformly-colored reddish/orangish thoraces. So I pigeon-holed all this variation into simply “gray spot or not”.

In a few instances where there are very large numbers of observations (fucosa in Ontario, Vermont, and Texas; miniata in Ontario), I only examined the first 200 usable adult images. I obviously ignored images of larvae, images showing only the underside of a moth, and moths on which there was so much wear on the thorax that the presence/absence of a gray spot couldn’t be judged. I also ignored, for the time being, about 261 observations which have been left at the genus level, even when I might have thought I could safely add an ID. I’ll try to do that later; for the present, I ignored them. There are many inherent biases in collections of iNat images, including multiple images of the same moth by different people, over-representation of certain locations by enthusiastic moth photographers, and of course my own errors in judging or counting gray spots. I gloss over all these for the present discussion. I can offer a pdf of my raw research notes for these state-by-state and province-by-province counts; message me below if you're interested.

For starters, here is an array of photos which show the variation in the thorax coloration in H. fucosa:
All images are used under a CC-BY-NC license.

1 H fucosa Quebec Larivée iNat 81105127 copy 2 H fucosa Ontario robertdifruscia inat 71500652 copy 3 H fucosa Quebec imbeaul iNat 70253252 copy 4 H fucosa Michigan jaspersail iNat 30150144 copy 5 H fucosa Missouri cunningly iNat 55931761 copy 6 H fucosa Missouri wildreturn iNat 1992669 copy 7 H fucosa TX Travis gcwarbler iNat 29633951 copy
Top row, from L to R: Quebec (@larivee), Ontario (@robertdifruscia), Quebec (@imbeaul), Michigan (@jaspersail), Missouri (@cunningly),
Bottom row, L to R: Missouri (@wildreturn), and Texas (@gcwarbler).

Here's an example of the distinctive Florida population of H. fucosa (@gaudettelaura). Note the presence of a gray spot; this differs from most other populations in the southern U.S.:
8 H fucosa FL gaudettelaura iNat 73448260 copy

Next is a set of Hypoprepia miniata from across its wide range:

10 H miniata Ontario bugsrock iNat 57226406 copy 11 H miniata Ontario markread iNat 55914713 copy 12 H miniata Ontario timthorington inat 58202220 copy 13 H miniata OK zdufran iNat 26130412 copy 14 H miniata FL mikehanson11 iNat 32898456 copy
From L to R: Ontario (unusual form with gray spot; @bugsrock), Ontario (@markread), Ontario (@timthorington), Oklahoma (@zdufran), and Florida (@mikehanson11).

The hand-drawn map below shows the percentage of all fucosa images by U.S. state which show a gray spot. (The percentage of Canadian fucosa examples with a gray spot ranges from 99-100% across all provinces from Alberta to Nova Scotia.)
Hypoprepia fucosa percent with gray spot

Here are some simple conclusions about the gray spot on the thorax of these two species:

— Painted Lichen Moth (H. fucosa) shows major variation in the presence of the spot. Across all of Canada and the northern tier of states from the Dakotas east to New England, the gray spot is nearly universal on identified images (pink area across the top of U.S.). At least 96.7% of these moths show a gray spot on the thorax; just 22 of 671 observations identified as fucosa in this region lacked a gray spot. This is probably a direct outcome of the traditional statements in the literature and guidance in field guides. Those “exceptions to the rule” are sprinkled from Ontario and Michigan east to New York and Maine.

— Across the southern U.S., from Kansas, Oklahoma, and Texas east to Maryland, Delaware, and down to Georgia, the gray spot is predominantly absent on identified fucosa (yellow shaded area on map). Only 68 of 1014 observations of identified fucosa showed a recognizable gray spot; this constitutes only 6.7% of identified individuals. Most of these “gray-spotted” fucosa in the southern U.S. are in Missouri and the mid-Atlantic Coast, but none of those states exceeded 17% of the sample with gray spots.

— There is a conspicuous zone right through the middle of the country from Nebraska and Iowa eastward to Pennsylvania and New Jersey where the percent of gray-spotted fucosa hovers around 40 to 50%. This is obviously a zone of blending or overlap in this character. It’s one of the regions of the country which deserves some more fine-grained examination in the future.

— A conspicuous outlier is Florida, in which 3/4 (74%) of all identified fucosa moths show an obvious gray spot, bucking the trend across the rest of the South. From a biogeographic standpoint, I don’t know what this means; it’s a distinctive and counter-intuitive result. Whatever the genetic factor or factors are that result in this Florida gray-spotting, they may also be the contributor, via gene migration or introgression up the coastal plain, to the slightly higher proportions of gray spotting in the mid-Atlantic States (well to the south of the northern gray-spotted region).

— Over the entire range of identified miniata, gray spots are notably rare. This is to be expected because of the literature and field guide pronouncements which heavily influence identifications. It simply goes against the grain to identify a Hypoprepia with a gray thorax spot as miniata (notice @bugsrock's example from Ontario, above). Fully 93% of all the identified miniata’s have a red thorax. The biggest occurrence of gray spots on miniata are in a large sample of the species in Ontario, Canada (26% of my subsample of 200 observations). Just 1 to 6 identified miniata with gray spots were scattered among 8 other states and provinces and most of these were in Canada.

The forewing ground color in this large sample of the two species shows even more exceptions to the rules (above) than the gray spots. There are innumerable identified miniata which have orange or yellow ground color or even fucosa-typical yellowish basal 2/3 of the forewings. I suspect a large chunk of these are misidentified. Similarly, among the sample of over 2000 fucosa observations that I examined, there is at least a small portion of them (in all regions) which appear to have the ground color of the wings completely red. Here again, a great many of these may be misidentified miniata, but were placed in the fucosa bucket simply because they have a gray thorax spot and we have been following the standard litany of the literature and field guides.

The correlation and geographic distribution of these various visible marks still need much work and analysis. For the moment, I would apply these “quack like a duck” rules:

— Across Canada and the northern U.S., if a moth has a gray thoracic spot and exhibits some orange or yellow tint on the forewings, label it as fucosa. If it is all scarlet including the thorax, label it miniata. If it shows some confusing or hard-to-judge combination of marks, put it at the genus level.

— Across the southern U.S., moths of this group which show the characteristic 2/3 base of the FW’s with yellowish ground color—irrespective of the presence/absence of a gray thorax spot (which will normally be absent), should be labeled fucosa. Only moths with all scarlet ground color on the forewings and thorax will deserve to be labeled miniata. Moths with intermediate orangy coloration for all the forewing ground color should probably be left at genus level.

What are we left with at present? Below are some cherry-picked images showing some "typical" examples of each species from far-flung corners of their respective ranges. There is much more variation in each region than can be illustrated here in just a small handful of images.

H fucosa Ontario robertdifruscia inat 71500652 H fucosa VA davewendelken iNat 54334126 H fucosa TX Travis Sexton iNat 29633951 H fucosa FL gaudettelaura iNat 73448260
Painted Lichen Moths (H. fucosa), L to R: Ontairo (@robertdifruscia), Virginia (@davewendelken), Texas (@gcwarbler), Florida (@gaudettelaura).

H miniata Ontario markread iNat 55914713 H miniata VA vailbass iNat 52829560 H miniata TX sambiology iNat 48607365 H miniata FL mikehanson11 iNat 32898456
Scarlet-winged Lichen Moth (H. miniata), L to R: Ontario (@markread), Virginia (@vailbass), Texas (@sambiology), and Florida (@gaudettelaura).

One thing that jumps out at me from uploading the previous arrays of images is that the two species seem to be much more difficult to separate in Texas than anywhere else--IF all of these are correctly IDed. Not surprisingly, Texas has the highest percentage of images currently left at the genus level. I don't know what that means. For many years I have been skeptical if true Scarlet-winged even occurs at all in Texas; we really don't see many/any typical "scarlet" examples. I guess I should complain that Hypoprepia-watchers in the northern latitudes and in Florida have it easy, but that's not really the case. As I mention above, the regional variation is considerable everywhere.

Future research should aim at sorting out the relationships of the thorax and wing patterns geographically, especially in the blend zone. Someone needs to dig back into original literature (e.g. early 20th century) to see what genitalic differences there may be. And of course, more DNA analysis (not just COI barcodes) is definitely needed on a continental scale to sort these out.

Oh, did I mention Hypoprepia cadaverosa (the “Cadaver Lichen Moth”) of the central and southern Rocky Mountains? It’s a dark western cousin of the above two species…or is it more like a sibling or twin?

H cadaverosa NM ronaldperry iNat 26015867
H. cadaverosa from New Mexico (@ronaldparry).

Time will tell.

Lähetetty 10. kesäkuuta 2021 02:24 käyttäjältä gcwarbler gcwarbler | 10 kommenttia | Jätä kommentti

31. tammikuuta 2021

A Sad Loss for iNaturalist

Black Ribbon

Greg W. Lasley
1949 - 2021

Greg passed away earlier this evening after struggling to recover from a serious illness.
His wife Cheryl was by his side at home in Dripping Springs, Texas.
I will have more information about this transition in a short while.
Right now I am still absorbing the news and trying to figure out
what the world will be like without my friend of 40 years.

Lähetetty 31. tammikuuta 2021 04:00 käyttäjältä gcwarbler gcwarbler | 9 kommenttia | Jätä kommentti

22. tammikuuta 2021

A Brief History of Texas Lepidoptera Observations on iNaturalist

As part of a research project on the distibutional biases of citizen science data such as iNaturalist, I have been examining the uploads of Lepidoptera observations (butterflies and moths) in my home state of Texas. I chose Lepidoptera because of my own particular taxonomic interests and because it offers a finite set of data to analyze. Here I present some details of the history of iNat uploads as background. All the data recited below are complete as of December 31, 2020, with most of the statistics accessed through the Explore page in the first few weeks of January 2021.

Figure 1a (below) shows a heat map of all the available Lepidoptera observations in Texas at the end of 2020. This can be compared to the distribution of all forms of life as shown in Figure 1b. These are intriguing maps but I'll reserve more discussion of them until I complete my research project. As of 31 December 2020, a total of 541,588 observations of Lepidoptera in Texas had been uploaded to iNaturalist by 26,022 observers (Fig. 1a). By iNaturalist's calculation, these document a total of 3,429 species or about 62% of the total Texas Lep fauna, which stands at about 5,502 species (Knudson & Bordelon 2018, fide @krancmm).

Fig 1a-b

History of uploads, observations, and observer base. iNaturalist was established with the first uploads by the U.C. Berkeley-based developers of the platform in March 2008 (@kueda et al.). The first Texas observation on the platform was, appropriately, an image of Texas Bluebonnets uploaded on 25 March 2008 by @lisa_and_robb:
The next three years saw only limited and apparently experimental uploads of a few Texas observations. The first Texas Lepidoptera upload of a recent living example was a Gulf Fritillary larva observed 23 August 2011 and uploaded 31 August 2011 by Kari Gaukler (@atxnaturalist):
In that first year of uploads (2011), just three observers uploaded a total of five observations documenting four species. Since those early uploads, several hundred observers have uploaded thousands of historical observations which predate the rollout of iNaturalist; the earliest "observations" of Lepidoptera in Texas now available on iNaturalist are actually digital images of museum specimens collected as far back as 1938:
Because of such uploads of historical records, a compilation of Texas Lepidoptera observations on the platform now shows some 7,587 observations through calendar year 2011. More widespread use of the platform started in 2012. Over the next five year period (2012-16), 2,664 contributors uploaded over 49,000 additional observations. The next watershed moment in the use of the platform came in 2017 when Texans began participating in the City Nature Challenge (organized by California Academy of Science and the Natural History Museum of LA County). From 2017 through 2020, 24,422 contributors uploaded nearly a half million additional observations. Table 1 (below) charts the growth of Lepidoptera uploads for the ten year time frame from the first uploads through 2020.

Growth of TX Lep Uploads

The set of figures below present heat maps of Texas Lepidoptera observations (including "historic" observations uploaded more recently) for periods representing (a) the entire 20th Century, (b) 2000 through 2009, (c) 2010 through 2019, and (d) just the observations for calendar year 2020. Available "historic" observations (i.e. through 2007) are still modest in number, particularly for the period of the 20th Century (Fig. 2a, b), predating the era of widespread digital photography. Numbers of available observations vastly increased after 2010 (Fig. 2c), mostly representing uploads of contemporary observations. For a variety of socioeconomic reasons in 2020, not the least of which was the Covid-19 pandemic, an increase of 44.5% in the total number of observers lead to a 50.6% increase in the total number of observations compared to the total number through the end of 2019 (Fig. 2d).

Fig 2a-d

My ongoing research will examine the geographic aspects of such data including comparisons to the distribution of the Texas population (an obvious comparison) and the distribution and efforts of iNaturalists who have contributed the observations.

I'm grateful to @sambiology, @mako252, @krancmm, @tiwane, and @loarie for help with some of this data and their early input on the direction of this project.

Lähetetty 22. tammikuuta 2021 16:59 käyttäjältä gcwarbler gcwarbler | 8 kommenttia | Jätä kommentti

27. lokakuuta 2020

Back Again From Wandering Westward

My wife and I just returned from another 5,000+ mile jaunt out west to see our daughter in Portland, OR. Ya know, scenery, mountains, rocks, trees … the same old stuff.

We took time to visit several national parks and other natural areas, so you’d think I’d have a lot of iNaturalist uploads to work on. Well, not so much. Aside from being late Fall in much of the region we traversed (e.g., the rabbitbrush was mostly finished blooming), the diagonal pathway we took from Austin, TX, to Portland, OR, and back traversed half a continent which is mostly in extreme to exceptional drought (see recent map, below). Symptoms of the drought (even in the Pac NW) included a sparsity of flowering plants and a major dirth of insects. Butterflies, for example, were extremely sparse everywhere. We’d see one or a few on a given day, sometimes none. It wasn’t until we dropped off the High Plains in Texas this past Sunday afternoon and exited the drought region that we began to see lots of butterflies on the wing. In the first 20 miles SE of Post, TX, I probably hit more butterflies on the grill of my car than we’d seen in the previous 5,000 miles of the trip.

In roughly chronological order, some of the locations we visited or passed through briefly included:

Arches National Park, UT
Bear River Migratory Bird Refuge, UT
Snake River Birds of Prey Natural Area, ID
Mount Rainier NP, WA
Klamath Lake, OR
Battle Creek Wildlife Area (Coleman Fish Hatchery), Shasta Co., CA
US 50 (“Loneliest Road in America”) across central NV
Great Basin NP, NV
Bryce Canyon NP, UT
Kodachrome Basin SP, UT
Capitol Reef NP, UT
Glen Canyon NRA, UT

Despite their rich natural histories and beauty, we did not dawdle crossing Texas or New Mexico; the latter state still doesn’t want us to stay. Sigh…

I’ll have images of several dozen plants and a handful of critters to upload over the next week or so as time permits, but I’ll look forward to visiting many of the same locations (and new ones) on a future visit after the drought, after Covid … generally after the world gets back to something resembling “normal”, even if it's a "new normal".

Lähetetty 27. lokakuuta 2020 14:34 käyttäjältä gcwarbler gcwarbler | 5 kommenttia | Jätä kommentti

4. syyskuuta 2020

Sorting out Feather-edged and Heppner's Petrophila

This journal post is a follow-up to my "A-hah!" moment published in early August*. I’m at a point in my next manuscript on the genus Petrophila that I need to sort out all the Texas observations of Feather-edged (fulicalis) and Heppner’s (heppneri) on iNaturalist which I was previously confusing. For the record, the two may be separated by the following set of field marks:

Fulicalis is overall a darker brown moth, usually with less orange in the various patches. On the FW, the pale speckled PM area has two or three conspicuous dark dots around its perimeter. Also on the FW, the orange tornal streak and the orange terminal band are separated at the base (at the anal angle). On the HW, the narrow pale median line is actually well-silvered; this can look whitish at some angles.

Heppneri: Overall somewhat paler brown with more apparent orange tint in various portions. The pale PM area of the FW is surrounded by a dusky circle but there are usually no conspicous dark dots around its margin. On the FW, the orange tornal streak and the orange terminal band are connected (wear can obscure this). On the HW, the pale median line is basically white, lacking any obvious silver scaling.

Both species have a dark capline over the top of some of the black HW eyespots. This capline tends to be shorter on fulicalis (just over 2 eyespots) but this is highly variable and subject to wear, or often not visible in photos.

Here is a typical fulicalis, documented by @sambiology in Throckmorton County:

and another in Hood County by @annikaml:

Here are a couple of the many beautiful heppneri documented by @ptexis in Val Verde County:


and another heppneri documented in Kerr County by @sambiology:

As I sort out the images, I have found that true Heppner’s Petrophila is confined to the southern half of the Edwards Plateau, documented thus far only in the following counties: Bandera, Blanco, Edwards, Kerr, Kimble, Real, Uvalde, and Val Verde. Records of this species pair outside of this region, such as north and east Texas, are known to or likely to refer to Feather-edged (e.g. a literature record by Blanchard & Knudson (1983) for Colorado County).

* See: https://www.inaturalist.org/journal/gcwarbler/39051-another-a-hah-moment-with-petrophila-moths

Lähetetty 4. syyskuuta 2020 21:16 käyttäjältä gcwarbler gcwarbler | 1 kommentti | Jätä kommentti

20. elokuuta 2020

Colorado Camping Vacation

My wife and I made a camping excursion to the Vallecito area of s.w. Colorado, August 7-15, to momentarily get out of the Texas heat. (A great many Texans were apparently doing the same thing!) I’ll have many observations to upload including a boat-load of plants from NM and CO. I thought I’d start with the “low-hanging fruit”: I put up a moth sheet in the Forest Service campground at Vallecito on three evenings and had good results. In all, I probably documented something just shy of 100 species of moths. The first uploads will exhibit some of the more recognizable macromoths such as the few dozen species of Geometrids that showed up. There will also be a rather bewildering array of dark mottled Noctuids and many small grayish micros. The habitat at our campsite (7900 ft elevation) was Ponderosa Pine-Douglas Fir forest with some understory of Aspen and Gambel’s Oak. We were close to a steep mountain slope with much Blue Spruce, Limber Pine and a variety of understory plants.

Identifying these moths from the Rockies is just good brain exercise. Keep checking back.

Lähetetty 20. elokuuta 2020 15:30 käyttäjältä gcwarbler gcwarbler | 40 havaintoa | 3 kommenttia | Jätä kommentti