On the occurrence in Acre of four poorly-known bird species in southwestern Brazilian Amazon

The geographical ranges of many bird species are neither uniform nor continuous. Species that are common in some regions may be rare in others, or their status of occurrence may be uncertain. Here, we present the first documented record of Azure Gallinule (Porphyrio flavirostris) as well as details and discussion on the distribution and status of previous records of the Least Bittern (Ixobrychus exilis), Paint-billed Crake (Neocrex erythrops), and Plain-breasted Ground-dove (Columbina minuta) in the Brazilian state of Acre. While all these species have relatively wide ranges, little is known of their distribution in the southwestern Amazon basin.