Utilization of a roadside survey technique to survey burrowing owls (Athene cunicularia hypugaea) in southeastern Alberta | Libros

Harlequin duck surveys in western Montana

James D. Reichel

1993

Birds of the Detroit-Windsor area

Alice H. Kelley

1963

Bird count

Humphrey M. Dobinson

1976

Report on a game survey of the north central states

Aldo Leopold

1931

Western (Aechmophorus occidentalis) and eared (Podiceps nigricollis) grebes of central Alberta

Stephen Hanus

2002

State of Singapore's wild birds and bird habitats

Kim Chuah Lim

2009

Burrowing owl population trends on the Kininvie Blocks from 1993-2007, and ancillary data for additional species at risk in 2007

Scott D. Stevens

2008

Results of a biological reconnoissance of the Yukon River region

Wilfred Hudson Osgood

1900