Species fact sheet
by Global Register of Migratory Species -
www.groms.de
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| Larus occidentalis |
Audubon, 1839 |
|
Family: Laridae |
Order: Charadriiformes |
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print version |
|
Western gull |
Goéland d'Audubon |
Gaviota occidental |
Westmöwe |
| Migration: range extension |
|
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Post-breeding movement to British Colombia and accidentally to peninsular Alaska, also S to the tip of Baja
California and occasionally to Sonora coast of Mexico, birds from S colonies disperse, those from N colonies
migrate S. Migration distance correlated with latitude, and young birds move further than adults. Farallon Is
birds are mainly sedentary, adults maintaining breeding territories most of year. Young birds disperse N to areas
of high oceanic productivity in summer, and move S to San Francisco Bay in winter. Dispersal of young varies
from year to year, depending on food availability, but adults tend to return to the same site each winter.
(del Hoyo J, Elliott A, Sargatal J (eds), 1996)
- digitised by GROMS, after del Hoyo J A Elliott; J Sargatal (eds) (1996) - www.hbw.com,
- Copyright: GROMS/BfN -
www.groms.de
| Regions: Mesoamerica, North America |
| Feedback: mail to Klaus Riede |
| (Last update: 05.03.04 by E.Heuel) |