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The
Heermann's Gull Larus heermanni is a gull resident in
the United States and Mexico. Of the current population
of about 150,000 pairs, 90% nest on the island of Isla
Rasa, Mexico, with smaller colonies as far north as California.
Post breeding dispersal occurs commonly to central California,
and less commonly north as far as British Columbia and
south as far as Guatemala. Current threats to this gull
include the effects of weather on prey species, but Isla
Rasa was declared a sanctuary in 1964, and egg-collecting
and disturbance during the breeding season is discouraged. |
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|
The
Heermann's Gull Larus heermanni is a gull resident in
the United States and Mexico. Of the current population
of about 150,000 pairs, 90% nest on the island of Isla
Rasa, Mexico, with smaller colonies as far north as California.
Post breeding dispersal occurs commonly to central California,
and less commonly north as far as British Columbia and
south as far as Guatemala. Current threats to this gull
include the effects of weather on prey species, but Isla
Rasa was declared a sanctuary in 1964, and egg-collecting
and disturbance during the breeding season is discouraged. |
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