papa-lagarta-do-mangue vs papa-lagarta-de-bico-preto

The Mangrove Cuckoo and Black-billed Cuckoo can be distinguished by their tail patterns and bill color. The Mangrove Cuckoo has a distinctive tail with broad white tips on the outer rectrices, while the Black-billed Cuckoo has a more uniformly colored tail. Additionally, the Mangrove Cuckoo has a black upper mandible and an orange-yellow base on the lower mandible, contrasting with the entirely dark bill of the Black-billed Cuckoo.

Look for the broad white tips on the Mangrove Cuckoo's tail when perched or in flight. Check the bill color: the Mangrove Cuckoo has a black upper mandible with an orange-yellow base on the lower mandible, while the Black-billed Cuckoo's bill is uniformly dark.

The Mangrove Cuckoo features a grayish crown and black auricular patch with bright buffy underparts, while the Black-billed Cuckoo lacks these features and is more uniformly colored. The Mangrove Cuckoo's outer rectrices are broadly tipped with white, creating a noticeable pattern, whereas the Black-billed Cuckoo has a more uniform tail coloration.