Anonymous. 2009. Eyes on the Sky, Counting for Conservation. The Raptor Population Index 2009 Annual Report. Produced by the Raptor Population Index Project Partnership. Plymouth, New Hampshire.

Anonymous. 2008. Eyes on the Sky, Counting for Conservation. The Raptor Population Index 2008 Annual Report. Produced by the Raptor Population Index Project Partnership. Plymouth, New Hampshire. 8 p. [ASR-07]

Anonymous. 2007b. Eyes on the Sky, Counting for Conservation. The Raptor Population Index 2007 Annual Report. Produced by the Raptor Population Index Project Partnership. Ithaca, New York. 6 p. [ASR-06]

Anonymous. 2007a. Raptor Population Index Update No. 2. Produced by the Raptor Population Index Project Partnership. Ithaca, New York. [ASR-05]

Anonymous. 2006. Eyes on the Sky, Counting for Conservation. The Raptor Population Index 2006 Annual Report. Produced by the Raptor Population Index Project Partnership. Ithaca, New York. 6 p. [ASR-04]

Anonymous. 2005b. Eyes on the Sky, Counting for Conservation. The Raptor Population Index 2004-2005 Annual Report. Produced by the Raptor Population Index Project Partnership. Ithaca, New York. 6 p. [ASR-03]

Anonymous. 2005a. Raptor Population Index Update No. 1. Produced by the Raptor Population Index Project Partnership. Kempton, Pennsylvania. [ASR-02]

Anonymous. 2004. Eyes on the Sky. The Raptor Population Index: Taking Flight. Produced by the Raptor Population Index Project Partnership. Ann Arbor, Michigan. 6 p. [ASR-01]