Molt and Aging Criteria for Four North American Grassland Passerines: Biological Technical Publication (Paperback) (ISBN-13: 9781507753613)

1Prairie and grassland habitats in central and western North America have declined substantially since settlement by Europeans (Knopf 1994) and many of the birds and other organisms that inhabit North American grasslands have experienced steep declines (Peterjohn and Sauer 1999; Johnson and Igl 1997; Sauer, Hines, and Fallon 2007). The species addressed here, Sprague's Pipit (Anthus spragueii), Grasshopper (Ammodramus savannarum) and Baird's (A. bairdii) sparrows, and Chestnut-collared Longspurs (Calcarius ornatus), are grassland birds that are of special conservation concern throughout their ranges due to declining populations and the loss of the specific grassland habitats required on both their breeding and wintering ranges (Knopf 1994, Davis and Sealy 1998, Davis 2003, Davis 2004, Jones and Dieni 2007).

Author: U. S. Fish &. Wildlife Service
ISBN-10: 1507753616
ISBN-13: 9781507753613
Publisher: Createspace Independent Publishing Platform
Language: English
Published: 02/13/2015
Pages: 30
Format: Paperback
Weight: 0.21lbs
Size: 11.02h x 8.50w x 0.06d