Range Map:Andrew Couturier Source: Ridgely et al, 2007. Digital Distribution Maps of the Birds of the Western Hemisphere, version 3.0. NatureServe, Arlington, Virginia, USA. www.natureserve.org/getData/birdMaps.jsp
Song: Low hollow calls, slightly nasal but not harsh or squeaking: "awwk awwk awwk". Much lower pitched and more nasal and lacks roughness typical of Western Gull's calls.
Sound: Kevin J. Colver; Sept; USA, California; Adult; Primary Sound;