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Dataset for Estimating eBird Arrival Dates and Temperature Anomalies for American Kestrels

In migratory birds, among- and within-species heterogeneity in response to climate change may be attributed to differences in migration distance and, consequently, environmental cues that affect timing of arrival at breeding grounds. We used eBird observations and a within-species comparative approach to examine whether migration distance (with latitude as a proxy) and climate explain spring arrival dates in a raptor species with a widespread distribution and diverse migration strategies, the American Kestrel Falco sparverius. We found an interactive effect between latitude and spring minimum temperatures on arrival dates, where at lower latitudes (short-distance migrants) kestrels arrived earlier in warmer springs and later in colder springs, but kestrels at higher latitudes (long-distance migrants) showed no association between arrival timing and spring temperatures. Increased snow water equivalent delayed arrival at all latitudes. Results support the hypothesis that short-distance migrants are better able to respond to conditions on the breeding ground than long-distance migrants, suggesting that long-distance migrants may be more vulnerable to shifts in spring conditions that could lead to phenological mismatch.

Data and Resources

FieldValue
Modified
2022-03-09
Release Date
2022-03-03
Publisher
Identifier
8960e097-6dee-4cf3-8577-7cf7cd05dc21
Spatial / Geographical Coverage Area
POLYGON ((-117.26756215096 41.805917561446, -117.26756215096 56.447543582088, -101.91760182381 56.447543582088, -101.91760182381 41.805917561446))
Spatial / Geographical Coverage Location
North America
Temporal Coverage
Tuesday, January 1, 2002 - 00:00 to Monday, December 31, 2018 - 00:00
Language
English (United States)
License
Author
Breanna F. Powers, Jason M. Siniarski, Juan M. Requena-Mullor and Julie A. Heath
Contact Name
Julie Heath
Contact Email
Public Access Level
Public
DOI
10.18122/bio_data/5/boisestate
Data available on:: 
Thursday, July 9, 2020