[2][3] In addition, in 2018 the committee split the eastern lowland population into a new species, the Amazonian grosbeak (Cyanoloxia rothschildii).

[7][8] Often blue-black grosbeaks will not be seen since they prefer to stay hidden among the vegetation, so most of the time their presence is known only when they vocalize.

It is found in Belize, Colombia, Costa Rica, Ecuador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Peru, and Venezuela.

[5] They prefer habitats which are dense with tall trees and undergrowth because this provides sufficient cover.

[8][9] The blue-black grosbeak construct little cup nests to lay their eggs in and normally have a clutch size of 2.

[10] The breeding season of the blue-black grosbeak takes place during the spring and summer months, however the peak period of the breeding season differs slightly between populations located in different areas.

[7] Blue-black grosbeaks are omnivorous; they have been known to eat seeds and fruits, as well as insects like ants and caterpillars.