BirdAnalyst
BBS Route · Washington · BCR 9

Snowden Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 127 species recorded across 41 survey years, still active.

127Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
41Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–2025Span
4Observers

Bird Species Found on Washington Snowden

Top 40 of 127 species by most recent count. Each links to its species trend.

Species recorded on the Snowden route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Spotted TowheePasserellidae602025+335%1973
American RobinTurdidae582025-51%1973
White-crowned SparrowPasserellidae512025-44%1973
European StarlingSturnidae472025-32%1973
Western TanagerCardinalidae312025+446%1973
Black-headed GrosbeakCardinalidae282025-24%1982
Brown-headed CowbirdIcteridae262025+138%1973
House SparrowPasseridae252025+16%1973
Brewer's BlackbirdIcteridae192025-67%1973
Common RavenCorvidae182025+780%1981
Black-capped ChickadeeParidae172025+39%1973
MacGillivray's WarblerParulidae172025+300%1983
Say's PhoebeTyrannidae161971n/an/a
Red-breasted NuthatchSittidae162025+175%1981
Nashville WarblerParulidae15202512×1981
Steller's JayCorvidae142025+20%1973
American CrowCorvidae142025+8%1973
Chestnut-backed ChickadeeParidae142025+309%1999
Western Wood-PeweeTyrannidae132025+71%1981
Chipping SparrowPasserellidae122025+108%1973
Warbling VireoVireonidae122025+400%1983
Red CrossbillFringillidae112025-46%2017
Violet-green SwallowHirundinidae102025-2%1982
Cliff SwallowHirundinidae102024-50%1981
California Scrub-JayCorvidae102025+322%1984
Eurasian Collared-DoveColumbidae102025+450%2014
Red-winged BlackbirdIcteridae92025+200%1973
Wild TurkeyPhasianidae92025+75%2018
Pine SiskinFringillidae82025-16%1973
Varied ThrushTurdidae81973+167%1971
Lark SparrowPasserellidae81994-17%1984
American GoldfinchFringillidae72025+3%1982
Tree SwallowHirundinidae72025-59%1981
Lesser GoldfinchFringillidae72025+150%2014
Mourning DoveColumbidae62024-72%1973
Swainson's ThrushTurdidae62025+5%1983
Evening GrosbeakFringillidae62025+88%1984
Northern House WrenTroglodytidae52025+107%1973
Purple FinchFringillidae52025-74%1981
Cassin's VireoVireonidae52024+133%1987

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.