The Crimson-collared Grosbeak Rhodothraupis celaeno of northeastern Mexico has now been shown to be closely related to the similar-looking but widely disjunct Red-and-black Grosbeak Periporphyrus eryhtromelas of northeastern South America (Barker et al. 2015, Bocalini et al. 2021), and is thus now treated as Periporphyrus celaeno by Chesser et al. (2023), WGAC, and Clements et al. (2023). A SACC proposal (https://www.museum.lsu.edu/~Remsen/SACCprop970.htm) is in progress.
Clements, J. F., P. C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2023. The eBird/Clements checklist of Birds of the World: v2023. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ (Link)
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.
