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First description of the breeding biology and natural history of the ochre-breasted brush finch atlapetes semirufus in venezuela

Wilson Journal of Ornithology

By:
,
DOI: 10.1676/07-020.1

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Abstract

We provide the first description of the eggs, breeding biology, and natural history of the Ochre-breasted Brush Finch (Atlapetes semirufus). We found 37 nests over four breeding seasons (2004-2007) in Yacamb?? National Park, Venezuela. Nesting activity started in late April and continued until early June suggesting single-brooded behavior despite a typical tropical clutch size of two eggs (x?? = 1.89) that were laid on consecutive days. Egg mass averaged 3.38 g and 11.6% of adult female mass. The incubation and nestling periods averaged 14.9 and 10.5 days, respectively. Only females incubated and the percent time they spent incubating did not change between early and late incubation. Females brooded 42.7% of the time when nestlings were 2 days of age and 20.5% when 9 days of age. Both parents provisioned young at a low rate (3.9 trips/hr) and nestling growth rate (k = 0.45) was also slow. Nest predation rates were relatively high with daily mortality rates of 0.058 and 0.067 during incubation and nestling stages, respectively.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
First description of the breeding biology and natural history of the ochre-breasted brush finch atlapetes semirufus in venezuela
Series title:
Wilson Journal of Ornithology
DOI:
10.1676/07-020.1
Volume
120
Issue:
4
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
856
Last page:
862
Number of Pages:
7