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- Larus brachyrhynchus
Length 38-41 cm, wingspan 100-120 cm, weight 325-495 g.
Adult plumage similar to Common Gull but with less black on wingtips, head more heavily streaked and bill with less black smudging in winter; iris mid brown, sometimes yellowish. Structure differs more, with relatively longer wings and more rounded head; bill shorter and weaker, and with less black marking in winter. Juvenile plumage markedly different, with uniform dusky brown head and underside, much broader blackish-brown tail band (no white base), and browner wings.
Breeds in Alaska and western Canada; winters along west coast of North America from Alaska south to Baja California, rare elsewhere in North America (but recorded east to Atlantic coast).
A scarce taxon, with a population of little over 10,000 pairs.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
- Olsen, K. M., & Larsson, H. (2003). Gulls of Europe, Asia and North America. Helm ISBN 978-0-7136-7087-5
- BirdForum Opus contributors. (2023) Short-billed Gull. In: BirdForum, the forum for wild birds and birding. Retrieved 9 December 2023 from https://www.birdforum.net/opus/Short-billed_Gull
GSearch checked for 2020 platform.