"The 200 photographs have been carefully selected to illustrate age, seasonal, and sexual variation in all of the species found north of Mexico, including intro
"Based on an analysis of 47 years (1967-2014) of Audubon Christmas Bird Counts (CBC), evidence for population changes and shifts in early winter (late December)
"This book is a comprehensive and peerlessly beautiful reference featuring species accounts, lavish photographs and range maps of every one of the 1,175 bird sp
A Guide to the Identification and Natural History of the Sparrows of the United States and Canada provides comprehensive information on all the features that ma