Black-billed Magpie Identification, All About Birds, Cornell Lab of Ornithology
October 2014 – Cheyenne Bird Banter
Eurasian Magpie - Pica pica - Birds of the World
Poultry Predator: Magpie
All About Birds Northwest Princeton University Press
Princeton University Press
ALL ABOUT BIRDS Regional Field Guides
Bananaquit Celebrate Urban Birds
About the Cornell Guide to Bird Sounds – Macaulay Library
Black-billed Magpie (Pica hudsonia)
Black-billed Magpie Identification, All About Birds, Cornell Lab of Ornithology
Oregon Backyard Feeder Birds: The Definitive Guide
We Helped Scientists Track Birds This Summer. - The New York Times