Literature: The Travails of Two Woodpeckers: Ivory-bills & Imperials
This book examines the history of the declines of two of the world's largest woodpeckers: Campephilus imperialis and C. principalis. The causes of decline and the question of whether these birds are extinct or not is discussed in detail. The authors (Noel F. R. Snyder, David E. Brown and Kevin B. Clark) take the view that these species are sadly extinct. Published in 2009 by the University of New Mexico Press, USA.