Ross's Gull (Rhodostethia rosea)

The Ross's Gull is a small, delicate gull with a rather mythic status among North American birders. Prior to the 1980s, the only place to reliably try and see the species in North America was during migration at a few locations in remote coastal Alaska, as the species typically breeds in Siberia and winters along the pack ice at sea. However, during the 1980s, Ross's Gulls were found nesting near Churchill, Manitoba, making the location a prime birding destination for birders wishing to see the species. The species has continued to nest near Churchill since the 1980s, and also has been found nesting in a few locations in remote northern Canada. Ross's Gulls are only rarely found in the lower 48 states of the United States, with less than 30 records as of 2010. However, November and December, 2010 brought a relative flurry of records, with 2 birds seen in South Dakota (the first seen in the state), another near Lincoln, Nebraska, and another in Colorado.

Habitat

During summer breeding season, nests on tundra and marshy bogs. During migration and winter, they are primarily found around pack ice or along northern coasts. Vagrants inland are typically found near large water bodies.

Diet

During migration and in winter, feeds on fish, crustaceans, and mollusks. During the summer breeding season, feeds primarily on insects.

Behavior

Feeds by flying slowly above the water, dropping down to pick food items off of the water's surface, or occasionally performing a shallow dive to grab fish and other prey. Vagrants found in North America often associate with Bonaparte's Gulls .

Breeding Map

Non-breeder in South Dakota.

Song

Vagrants seen in North America are typically quiet, although they will occasionally give a high-pitched mew .

Migration

Primarily breeds in the northern reaches of Siberia. Winters along the pack ice of the Arctic Ocean, with very rare strays further south in winter. Migrating populations are often seen in certain locations in northern Alaska.

Interactive eBird Map

Click here to access an interactive eBird map of Ross's Gull sightings

Similar Species

Somewhat similar to Bonaparte's Gull , although structural and plumage differences are obvious with a good view.

Conservation Status

Global populations are thought to be around 10,000 individuals, but populations appear to be stable. Breeding areas are remote and at little risk from human interference, although climate change could affect habitats in breeding locations in Siberia.

Photo Information

December 1st, 2010 - Gavin's Point Dam , Nebraska/South Dakota border - Terry Sohl