First record of Amazonian Black-Tyrant, Knipolegus poecilocercus (Aves, Tyrannidae) for the state of Acre, Brazil

Abstract

The Amazonian-Black-Tyrant, Knipolegus poecilocercus (Pelzeln, 1868), belongs to the Tyrant Flycatcher family, Tyrannidae, a group characterized by a high diversity of bird species worldwide, constituting 18% of the Passeriformes Order in South America. This species measures approximately 13 cm in length and exhibits sexual dimorphism, with males being entirely black and females displaying an olive-brown coloration with a streaked breast. They inhabit wet areas near streams and lakes. This study presents the first record of the species in the state of Acre, contributing to the understanding of the species' distribution in the Amazon and revealing a greater diversity of previously unknown bird species in the region. This emphasizes the need for continuous efforts in exploration and conservation in the Amazon.