Kleptoparasitism in the Great Kiskadee

摘要

Kleptoparasitism has been exten- sively described for raptors and seabirds, but there are fewer observations for passerine birds. Here we de- scribe several events of interspecific kleptoparasitism in the Great Kiskadee (Tyrannidae: Pitangus suophur- atus) in Buenos Aires, Argentina. Although interspe- cific kleptoparasitism has not been described previous- ly for this species, we believe this foraging strategy is more common than expected for a passerine bird. The observations described in this paper are consistent with four of the six ecological conditions proposed by Brockmann and Barnard (1979).