Abstract
The interactive behaviors among birds are usually related to foraging and competition for resources. In some cases, birds can develop aggressive behaviors, such as mobbing behavior to reduce predation risk. This behavior is more common in smaller birds, thus this short communication describes this antagonistic conduct between two raptors. Seven displays of mobbing by the Yellow-headed Caracara over the Southern Caracara were recorded in the reproductive period of 2012. In this case, this aggressive behavior could be held as a preventive action against predation of nests and newborn chicks. Keywords: Yellow-headed Caracara, Milvago chimachima , Southern Caracara, Caracara plancus, agonistic interaction, Falconidae.
Highlights
O comportamento social entre aves normalmente está relacionado ao forrageamento e à competição por recursos
Gustavo Francisco Aver, Renata De Boni Dal Corno, Maria Virginia Petry there are no records of mobbing behavior between these two predatory birds: the Yellow-headed Caracara, Milvago chimachima (VIEILLOT 1816), and the Southern Caracara, Caracara plancus (MILLER 1777), and, this paper describes the mobbing behavior between both species for the first time
The observation took place in Bom Jesus, RS, Brazil (28°37’27.21”S 50o30’09.52”O), in an area of 1971.40 ha, located in the Araucaria Plateau, which is inserted into the Atlantic Forest biome
Summary
O comportamento social entre aves normalmente está relacionado ao forrageamento e à competição por recursos. Some of the smaller birds developed mobbing behavior, instead of escaping from the predator (Coulson et al, 2008).
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