Friday, July 26, 2019

Heermann’s Gull

Heermann’s Gulls are another species with an odd, northward, post-breeding migration. Almost the total population nests fom March through July in a sanctuary in the Gulf of California in Mexico. Nonbreeders appear off southern California coasts at the end of May. Postbreeding birds appear a bit later. The gulls then migrate along the Pacific Coast, appearing in British Columbia during July and August. The gulls then turn south during the fall and winter, occasionally leaving stragglers to remain all year. Some feed along the coast, like this one Erika and I photographed on 20 July 2019 at Ocean Shores, Washington. Mosr feed several miles offshore, where they feed on herring, but are not adverse to stealing food from other seabirds. The Heermann’s Gull is named after Adolphus Lewis Heermann, a nineteenth-century explorer and naturalist (Islam 2002).

No comments:

Post a Comment