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At least 1,459 records · Page 81Linked to original sources
USGS1996

Ecology, Conservation, and Management of Colonial Waterbirds in the Mediterranean Region

(excerpt from Forword) The Mediterranean Symposium, part of the annual conference of The Colonial Waterbird Society in October 1993 in Arles, France, was the successful culmination of ideas shared among leading European waterbird and wetland scientists... Both invited and contributed papers focused on two areas - breeding biology (especially of threatened or little known species), and feeding ecology. Eighteen oral presentations were given and 27 poster papers were developed.

Colonial Waterbirds↗
USGS1986

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

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

Book chapter↗