BirdAnalyst
BBS Route · Washington · BCR 9

Brewster Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 113 species recorded across 40 survey years, still active.

113Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1977–2018Span
6Observers

Bird Species Found on Washington Brewster

Top 40 of 113 species by most recent count. Each links to its species trend.

Species recorded on the Brewster 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
Cliff SwallowHirundinidae492018-77%1979
GadwallAnatidae352018+543%1986
BuffleheadAnatidae222008+200%2000
Ring-billed GullLaridae192011-28%1979
California QuailOdontophoridae182015-7%1979
Red-winged BlackbirdIcteridae162018+119%1979
American CootRallidae142018+46%1979
MallardAnatidae132018-42%1979
Eastern KingbirdTyrannidae122015+11%1979
American GoldfinchFringillidae122018+657%1979
RedheadAnatidae122018+940%1982
Northern ShovelerAnatidae112014+533%1980
Mourning DoveColumbidae112018-5%1979
American White PelicanPelecanidae112009n/an/a
Rock PigeonColumbidae102018+77%1979
Brewer's BlackbirdIcteridae92018-79%1979
House FinchFringillidae82015+258%1979
Barn SwallowHirundinidae82018+156%1979
Common RavenCorvidae82018+50%1981
Lesser ScaupAnatidae82014-48%1984
CanvasbackAnatidae82012+57%1997
Canada GooseAnatidae72018-35%1980
Horned LarkAlaudidae72018-33%1979
Tree SwallowHirundinidae7201433×1991
Black-crowned Night HeronArdeidae71986n/an/a
Eurasian Collared-DoveColumbidae72014-10%2012
Ruddy DuckAnatidae62018-17%1982
Pied-billed GrebePodicipedidae62018+367%1983
Western KingbirdTyrannidae52018-39%1979
Yellow-headed BlackbirdIcteridae52018+571%1980
Vesper SparrowPasserellidae52018-56%1979
SoraRallidae52000n/an/a
Common GoldeneyeAnatidae52004n/an/a
Blue-winged TealAnatidae42018-85%1980
European StarlingSturnidae42018+0%1979
Brown-headed CowbirdIcteridae42015-41%1979
Western MeadowlarkIcteridae42018-47%1979
Lark SparrowPasserellidae42015-14%1980
Western Wood-PeweeTyrannidae42015+143%1991
American CrowCorvidae42014+213%1982

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.