The aim of this work is to study behavioral patterns of Molothrus bonariensis (Gmelin, 1789) in natural conditions, drawing its ethogram. Field efforts were carried out in Seropédica, Rio de Janeiro state, Brazil, by means of continuous naturalistic observations and focal-animal, using a 10 x 50 binoculars mainly in the morning until 07:00 h and in the afternoon after 16:00 h. A total of 25 conducts were detected and grouped in seven behavioral categories: locomotion (n = 7), maintenance (n = 5), social non-agonistic (n = 5), feeding (n = 2), social-agonistic (n = 2), vigilance (n = 2) and sonorous (n = 2).
Behavior; locomotion; maintenance; Rio de Janeiro
