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Regional fidelity and movement patterns of wintering killdeer in an agricultural landscape

Waterbirds

By:
and

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Abstract

Killdeer (Charadrius vociferus) is a common and widespread North American species for which there are few studies of residency patterns and movements. We quantified fidelity and movement patterns of 24 radio-tagged Killdeer in the Willamette Valley of Oregon during the winter of 1999-2000. Results from telemetry surveys and census efforts revealed that the group monitored was composed of winter residents (63%), winter transients (26%), and year-round residents (11%). Movements were localized with birds detected at an average distance of 5.15 A? 0.91 (SE) km from the site of capture. Mean home range size (95% kernel) was 7.73 A? 3.19 km2. However, results also indicated periodic exploratory movements, with some birds detected up to 30 km from marking sites. Overall, individuals exhibited a low degree of fidelity to specific sites and were detected at an average of 11.9 A? 1.1 sites. No differences were found in monthly movement patterns. In almost all cases, year-round residents were more sedentary than winter residents and winter transients. Results indicate a complex regional population structure and highlight the need to consider both migrant and resident birds, as well as seasonal differences in habitat needs and space use requirements, in future conservation planning efforts.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Regional fidelity and movement patterns of wintering killdeer in an agricultural landscape
Series title:
Waterbirds
Volume
25
Issue:
1
Year Published:
2002
Language:
English
Contributing office(s):
Forest and Rangeland Ecosystem Science Center
Description:
p. 16-25
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Waterbirds
First page:
16
Last page:
25