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The patient predator : foraging and population ecology of the Great Blue Heron Ardea herodias in British Columbia

Robert W. Butler
Bok Engelsk 1995

The abundance and distribution of estuarine birds in the Strait of Georgia, British Columbia

Robert W. Butler, Kees Vermeer (editors)
Bok Engelsk 1994

Ecology, status, and conservation of marine and shoreline birds on the west coast of Vancouver Island : proceedings of a symposium sponsored by the Institute of Ocean Sciences, the Canadian Parks Service, and the Canadian Wildlife Service, held at the Institute of Ocean Sciences in Sidney, B.C., 8 april 1991

Ecology, status, and conservation of marine and shorelinebirds on the west coast of Vancouver Island
Bok Engelsk 1992

The birds of the Fraser River delta : populations, ecology and international significance

Robert W. Butler, R. Wayne Campbell
Bok Engelsk 1987

The birds of the Creston Valley and southeastern British Columbia

Robert W. Butler, Brian G. Stushnoff, Edw...
Bok Engelsk 1986

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