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Conservation of migratory raptors: An overview based on fifty years of raptor banding

By:
Edited by:
S.E. Senner, C.M. White, J.R. Parrish

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Abstract

During the 50-year period 1931-80, 422,000 raptors were banded in the United States and Canada. Encounter rates were calculated, by decades of banding, for all birds reported outside of the l0-min block of latitude and longitude where they had been banded. Encounter rates for the various raptor species decreased from about 15-25% in the 1930s to about 1-5% in the 1970s. The percentage of encounters that were reported as shot also decreased sharply, from 55-85% for most species in the 1930s to 3-16% in the 1970s, reflecting the increase in protective state and federal legislation. During the same period the percentage of raptors found dead increased. In contrast, no such trends were apparent in raptors encountered south of the United States

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Conservation of migratory raptors: An overview based on fifty years of raptor banding
Series number:
5
Year Published:
1986
Language:
English
Publisher:
Raptor Research Foundation
Publisher location:
Hasting, Minnesota
Contributing office(s):
Patuxent Wildlife Research Center
Description:
vii, 87
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
First page:
26
Last page:
34