Blue Vanga is split into two species, based on differences in plumage in both sexes (del Hoyo and Collar 2016). The polytypic group Blue Vanga (Comoro) Cyanolanius madagascarinus comorensis/bensoni becomes Comoros Blue Vanga Cyanolanius comorensis, with subspecies comorensis and bensoni; and the monotypic group Blue Vanga (Madagascar) Cyanolanius madagascarinus madagascarinus becomes Madagascar Blue Vanga Cyanolanius madagascarinus.
Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.