Blue-black grosbeak

The blue-black grosbeak is found in the family Cardinalidae, within the order Passeriformes. Although it is still sometimes placed in the genus Cyanocompsa, it was found that this genus is paraphyletic and contains members of the genus Amaurospiza and Cyanoloxia.[3]

There are three subspecies in this taxa: Cyanoloxia cyanoides cyanoides, Cyanoloxia cyanoides caerulescens, and Cyanoloxia cyanoides concreta. Although these three subspecies are very similar, there are slight differences between them. Males all have dark blue plumage, however, C.c. concreta has the darkest of the three and is also the largest. Next, in terms of size and coloration, is C.c. caerulescens, followed by C.c. cyanoides, which has the smallest size and brightest plumage.[4][5]

Originally there was a fourth subspecies, C.c. rothschildii, the only subspecies found to the east of the Andes.[4] However, after examining the genetics of this subspecies, it was determined that C.c. rothschildii would be considered a separate species, Cyanoloxia rothschildii.[2]

The blue-black grosbeak is sexually dimorphic. Females have dark brown plumage which can have a slight reddish hue. Males are dark blue with lighter blue eyebrows and shoulder patches on their wings. The forehead, the area just above the beak, is also a lighter shade of blue.[6][7]

The distribution of the blue-black grosbeak is limited to the Central and South American. It is found in Belize, Colombia, Costa Rica, Ecuador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Peru, and Venezuela.[9]

Both C.c. caerulescens and C.c. concreta are found in Mexico and Central America, while C.c. cyanoides can be found from Panama to northern South America.[4]

They prefer habitats which are dense with tall trees and undergrowth because this provides sufficient cover. Although not generally seen, the blue-black grosbeak can be found at edges of broadleaf forests.[7][8]

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  Male in Costa Rica
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  Blue-black grosbeak, El Tapir, Costa Rica