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Bird activity levels related to weather

By:
Edited by:
C. John Ralph and J. Michael Scott

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Abstract

The Breeding Bird Survey data bank serves as a primary source for studying effects of sky cover, wind speed, and temperature on bird census results. Other standardized methods, such as spot-mapping (Breeding Bird Census), point counts, banding, and the Winter Bird Survey, provide additional, but limited, means of assessing effects of weather. Numbers of songbirds detected are generally inversely correlated with wind speed, but hawks often are seen in larger numbers on windy days. Rain greatly reduces the numbers of birds detected. Cloud cover has relatively little influence on early morning bird counts during the peak of the breeding season. Fog selectively favors auditory detections of some species. Counts of many species are correlated with temperature, but effects are minor unless temperatures are extreme. Under marginal weather conditions, total species observed may be nearly normal, whereas number of individuals observed is reduced, as is the opportunity to record simultaneous registrations

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Bird activity levels related to weather
Year Published:
1981
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
x, 630
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
Estimating Numbers of Terrestrial Birds
First page:
301
Last page:
310