Cover
bo42-1-web.pdf
Bird Observer
Contents
Ernst Mayr: Building on Charles Darwin’s Legacy in the Twentieth Century
William E. Davis Jr.
Photo Essay: Snowy Owl Season
David M. Larson
Gleanings: Three Degrees of Sweetness
David M. Larson
About Books: Driven
Mark Lynch
Bird Sightings: September/October 2013
Seth Kellogg, Marjorie W. Rines, and Robert H. Stymeist
About the Cover: Horned Lark
William E. Davis Jr.
At a Glance: December 2013
Wayne R. Petersen