Additional References February 2011
Augustine and Milchunas 2009
AZ Atlas 2005
BirdLife International 2010
Ceballos et al 2010
Day 1996
Dechant et al 2002
Dinsmore and Smith 2010
Dinsmore and Knopf 2005
Dreitz et al 2010
Drietz and Knopf 2007
Hawks Aloft 2010
Hunting et eal 2001
Knopf and Miller 1994
Knopf and Rupert 1999
Knopf and Rupert 1995
Knopf and Rupert 1996
Macias Durante and Panjabi 2010
Manning and White 2001
Ohlendorf et al 1987
Peterson et al 2003
Pitman et al 2005
Sager 1995
Sauer 2010
Shuford et al 2004
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