Molt and aging criteria for four North American grassland Passerines
By: Peter Pyle, Stephanie L. Jones, Janet M. Ruth
Contributors: Jones, Stephanie L.; Ruth, Janet M.; U.S. Fish and Wildlife Service
Series: Biological technical publication -- BTP-R6001-2008
Publisher: U.S. Fish & Wildlife Service
Published: 2008
Place of publication: Washington, D.C
Language: eng
Number of pages: 19
Subjects: Passeriformes; Age determination; Physiology; Molting
Notes: Shipping list no.: 2009-0136-P.

"September 2008"--P. [4] of cover.

Includes bibliographical references (p. 18).