BirdAnalyst
BBS Route · Oregon · BCR 5

Glasgow Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 101 species recorded across 25 survey years, still active.

101Species 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 →
25Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1986–2025Span
4Observers

Bird Species Found on Oregon Glasgow

Top 40 of 101 species by most recent count. Each links to its species trend.

Species recorded on the Glasgow 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
Swainson's ThrushTurdidae642025+23%1988
Song SparrowPasserellidae502025+40%1988
American CrowCorvidae422025+112%1988
Canada GooseAnatidae372025+198%2008
MallardAnatidae332024+242%1989
Violet-green SwallowHirundinidae292025+103%1988
Red CrossbillFringillidae272024+288%2011
Barn SwallowHirundinidae242025+50%1988
Cliff SwallowHirundinidae232022+27%1989
White-crowned SparrowPasserellidae222025+53%1988
Double-crested CormorantPhalacrocoracidae21202513×1995
Black-headed GrosbeakCardinalidae182025+100%1988
American RobinTurdidae182025-25%1988
Steller's JayCorvidae162025+146%1988
Brown-headed CowbirdIcteridae162025+0%1988
Turkey VultureCathartidae152025+231%1988
Tree SwallowHirundinidae132025-10%1990
Spotted TowheePasserellidae112025-10%1988
Western TanagerCardinalidae112025+48%1988
Wilson's WarblerParulidae112025+17%1988
Marsh WrenTroglodytidae112025+156%1994
Warbling VireoVireonidae92025+138%1988
Western Wood-PeweeTyrannidae82025-17%1988
Purple FinchFringillidae82025-20%1988
American GoldfinchFringillidae72025-37%1988
Black-capped ChickadeeParidae72025+46%1988
Chestnut-backed ChickadeeParidae72025+500%1988
Glaucous-winged GullLaridae72015+225%1990
Common RavenCorvidae62025+67%1988
Pacific WrenTroglodytidae62025+0%1988
Band-tailed PigeonColumbidae52025+92%1988
Golden-crowned KingletRegulidae52025-72%1994
House SparrowPasseridae42025+63%1988
Belted KingfisherAlcedinidae42025-13%1989
Cassin's VireoVireonidae41996+67%1990
Caspian TernLaridae42021-44%1994
Willow FlycatcherTyrannidae42025+125%1995
Brown CreeperCerthiidae42024-25%2013
Common MerganserAnatidae42018+300%2016
House FinchFringillidae32025-50%1988

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