Crows, Jays and Magpies Oregon Department of Fish & Wildlife
Black-billed magpie - Wikipedia
ODFW Recreation Report: Northwest Zone
Shrikes, Jays and Crows of Columbia County, Oregon – Wild Columbia County
Jays, Crows, and Magpies — Sacramento Audubon Society
Birds Oregon Department of Fish & Wildlife
Corvidae: Crows, Jays, and Magpies –
ODFW Recreation Report: Northwest Zone
Black-billed Magpie Sounds, All About Birds, Cornell Lab of Ornithology
8 Types of Corvids Found in Oregon (Crows, jays) - Bird Watching HQ