Accession Number : ADA285236


Title :   The Behavior and Ecology of Fall Peregrine Falcons at Lummi Bay and Vicinity, Whatcom County, Washington


Descriptive Note : Study rept.


Corporate Author : CORPS OF ENGINEERS SEATTLE WA SEATTLE DISTRICT


Personal Author(s) : Anderson, Clifford M ; Knapp, Randall K ; Fackler, James K


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a285236.pdf


Report Date : Jan 1984


Pagination or Media Count : 70


Abstract : The behavior and ecology of Peregrine-Falcons were studied at Lummi Bay, Whatcom County, Washington, from October through December, 1983. Peregrines were observed 207 times on 80% of the field days. We identified a minimum of 15 individual falcons during the study. The main peregrine activity was centered in and around Lummi Bay. Habitat preferred by the dominant adult female included a wooded ridge, tidal mudflats, and level agricultural fields. Combined observations yielded 154 hours and 46 minutes of direct study of peregrine behavior: falcons were perched 84% of that time, in flight 16%. Forty two prey items, primarily ducks and shorebirds, were recovered. Peregrines were successful hunters 22% of the time; 153 hunting flights were witnessed. An adult female was radio-tagged on 1 December and followed over the next 30 days. She roosted in the San Juan Islands, 11 miles southwest of the main study area.


Descriptors :   *BIRDS , *ECOLOGY , OBSERVATION , FLIGHT , RADIO EQUIPMENT , FEMALES , RIDGES , DUCKS , TIME STUDIES , ISLANDS , ADULTS , BEHAVIOR , HABITATS


Subject Categories : Ecology


Distribution Statement : APPROVED FOR PUBLIC RELEASE