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Movements and survival of lark bunting fledglings

The Condor

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Abstract

We quantified post-fledging pre-independence behavior and survival in Lark Buntings (Calamospiza melanocorys) using radio-telemetry. Brood division was recorded in six broods and was maintained throughout the observed fledgling care period. Chicks were capable of short flights (up to 25 m) by fledgling day 6 and longer flights (to 100 m) by fledgling day 13. During the first three weeks after fledging, juveniles moved as far as 800 m from nests. Nine of 23 (39%) monitored fledglings died within 15 days of fledging, primarily due to predation by raptors. Daily survival rates were 0.953 +/- 0.019 for fledgling days 0a??9, 0.955 +/- 0.038 for fledgling days 10a??20, and 0.953 +/- 0.015 for fledgling days 0a??20. The probability of surviving fledgling days 0a??20 was 0.367. More quantification of juvenile survival is clearly needed to understand the role of post-fledging mortality in source-sink dynamics.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Movements and survival of lark bunting fledglings
Series title:
The Condor
Volume
103
Issue:
3
Year Published:
2001
Language:
English
Contributing office(s):
Fort Collins Science Center
Description:
p. 643-647
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
The Condor
First page:
643
Last page:
647
Number of Pages:
5