Since its ninth report (Merrill and Bartels 2015) the Washington Bird Records Committee has reviewed 352 reports representing 97 species and seven subspecies. A total of 280 reports were endorsed, an acceptance rate of 80%. Ten species were added to the Washington state list: the Lesser Sand-Plover (Charadrius mongolus), Wilson’s Plover (C. wilsonia), Wood Sandpiper (Tringa glareola), Scripps’s Murrelet (Synthliboramphus scrippsi), Guadalupe Murrelet (S. hypoleucus), Eastern Wood-Pewee (Contopus virens), McCown’s Longspur (Rhynchophanes mccownii), Canada Warbler (Cardellina canadensis), Eastern Meadowlark (Sturnella magna), and Lawrence’s Goldfinch (Spinus lawrencei); as well as four subspecies: the Vega Herring Gull (Larus argentatus vegae), Eastern Nashville Warbler (Oreothlypis ruficapilla ruficapilla), Thick-billed Fox Sparrow (Passerella iliaca megarhyncha group), and Eastern Purple Finch (Haemorhous purpureus purpureus). The Washington state list now stands at 507 species.