Translator Disclaimer
1 December 2008 Risk Factors for Predation Attempts by Peregrine Falcons (Falco peregrinus) on Staging Semipalmated Sandpipers (Calidris pusilla)
Author Affiliations +
Abstract

Risk factors for predation attempts by Peregrine Falcons (Falco peregrinus) were examined in Semipalmated Sandpipers (Calidris pusilla) during fall staging in the Bay of Fundy, Canada. Odds of attacks may be expected to vary with a host of factors such as time of day, time of year, spacing within groups and weather conditions. During the ebbing tide, 65 surprise attacks by falcons were recorded over 596 observation periods. Two factors emerged as risk factors for predation attempts by Peregrine Falcons on Semipalmated Sandpiper flocks during four consecutive fall staging periods. Falcons initiated attacks more often on denser flocks and later during the migratory stopover. Year, time of day and weather factors did not influence attack rate. These findings may reflect lower anti-predator vigilance in denser groups and the greater numbers of sandpipers available in the later stages of stopover. Fitness consequences of these attacks remain to be established.

Guy Beauchamp "Risk Factors for Predation Attempts by Peregrine Falcons (Falco peregrinus) on Staging Semipalmated Sandpipers (Calidris pusilla)," Waterbirds 31(4), 651-655, (1 December 2008). https://doi.org/10.1675/1524-4695-31.4.651
Received: 9 November 2007; Accepted: 1 May 2008; Published: 1 December 2008
JOURNAL ARTICLE
5 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top