Loggerhead shrike population trends in western Canada
By: by B. Johns ... [et al.].
Contributors: Canadian Wildlife Service
Series: Progress notes -- no. 218; Progress notes (Canadian Wildlife Service) -- no. 218
Publisher: Canadian Wildlife Service
Published: 2002
Place of publication: Ottawa]
Language: eng
Subjects: Bird populations $z Canada, Western $x Statistics; Loggerhead shrike $z Canada, Western $x Geographical distribution
Notes: Caption title.

"December 2002."

Includes bibliographical references (p. 5-6).