“…Mostly, simple counts of sightings of bird species or their nests were conducted. This was carried out in systematic and non-systematic ways, and sometimes with the help of tools such as aircraft (Briggs et al 1984, Hodgson et al 1987, 1988, Haney 1989b, helicopter (Wallin et al 1992, Herr and Queen 1993, Morrison 1997, Jenkins et al 2003a, boat (Briggs et al 1984, Haney and McGillivary 1985a, Briggs et al 1987, Haney 1989b, Huettmann and Diamond 2001, Yen et al 2004, canoe (Groom and Grubb 2002), radio telemetry (Young et al 1987, Hunsaker et al 2002, Fearer and Stauffer 2003 or satellite telemetry (Guinet et al 1995, Jouventin et al 1994, Rodhouse et al 1996. A direct link between bird breeding sites and satellite imagery was applied by Guinet et al (1995) and Schwaller et al (1984Schwaller et al ( , 1986Schwaller et al ( , 1989.…”