Cornell Lab of Ornithology—Home Birds, Cornell Lab of Ornithology
ALL ABOUT BIRDS Regional Field Guides – Cornell Lab Publishing Group
The Living Bird: A Foreword by Barbara Kingsolver — The Mountaineers
Pyrrhuloxia Overview, All About Birds, Cornell Lab of Ornithology
The perfect guide to the birds of the southwestern United States, from the #1 birding website AllAboutBirds.orgThe All About Birds Regional
All About Birds Southwest|Paperback
Plumages, Molts, and Structure - Pyrrhuloxia - Cardinalis sinuatus
Feather Tailed Stories: (southwest) Northern Cardinal / Pyrrhuloxia
Princeton University Press
ALL ABOUT BIRDS Regional Field Guides
ALL ABOUT BIRDS Regional Field Guides – Cornell Lab Publishing Group
Pyrrhuloxia Overview, All About Birds, Cornell Lab of Ornithology
Pyrrhuloxia Identification, All About Birds, Cornell Lab of