Nesting biology of the Olive Finch (Arremon castaneiceps) in southeastern Peru

作者：Florez V Camilo; Londono Gustavo A

来源：Ornitologia Neotropical, 2012, 23(3): 417-427.

• Olive-Finch
• Arremon castaneiceps
• incubation behavior
• nesting biology

The Olive Finch (Arremon castaneiceps) inhabits the Andean foothills from Colombia to Peru and is uncommon throughout its distribution. Information on nesting behavior is limited and fragmented. In this study, we provide a detailed description of the nesting biology of A. castaneiceps. We found five active, dome-shaped nests built on rocky walls and vines next to small creeks. Clutch size was two eggs and egg color did not vary among individuals as mentioned in previous studies. We monitored incubation behavior at three nests and nestling development at one. On average, females spent 54.3% of their time incubating. The time spent by females on the nest decreased as incubation period progressed. Females made 9.6 trips per day, and foraging trips lasted, on average, 35.5 min and average time on the nest was 46.2 min. The nestling period was 18 to 20 days, and the nestling was able to regulate its body temperature 12 days after hatching. Time devoted to incubation was similar to other species of the genus Arremon, but decrease in nest attentiveness as incubation progressed is not consistent with previous findings. The nestling period was longer compared to other species of the genus and body temperature regulation seems to correlate with the plateau of body mass and when the feathers started to appear. Combined with previous studies these data suggest that A. castaneiceps may have specific requirements for nesting sites, small well-preserved creeks, which may explain why this species is uncommon throughout its distribution.

• 出版日期2012