BirdAnalyst
BBS Route · Wyoming · BCR 10

Boulder Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 103 species recorded across 24 survey years, still active.

103Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1982–2025Span
4Observers

Bird Species Found on Wyoming Boulder

Top 40 of 103 species by most recent count. Each links to its species trend.

Species recorded on the Boulder 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
Black-billed MagpieCorvidae96202512×1984
Cliff SwallowHirundinidae802025+86%1984
Vesper SparrowPasserellidae622025+443%1984
Brewer's BlackbirdIcteridae512025-13%1984
Brewer's SparrowPasserellidae392025+20%1984
Savannah SparrowPasserellidae322025+38%1984
Tree SwallowHirundinidae322025+750%2006
Red-winged BlackbirdIcteridae312025-72%1984
Sandhill CraneGruidae222025-14%1984
American CrowCorvidae192025-27%1984
Yellow-headed BlackbirdIcteridae182025-21%1984
Western MeadowlarkIcteridae182025-49%1984
Sage ThrasherMimidae182025-13%1984
American RobinTurdidae182025-63%1984
Green-tailed TowheePasserellidae182025+273%2006
Wilson's SnipeScolopacidae162025-4%1984
Yellow WarblerParulidae142025+5%1984
Western Wood-PeweeTyrannidae122025+33%2007
House SparrowPasseridae112025+17%2006
Mourning DoveColumbidae102025-57%1984
Song SparrowPasserellidae102025+400%1998
European StarlingSturnidae92025-48%1997
Canada GooseAnatidae92024+200%1997
Red-tailed HawkAccipitridae72025+100%1984
Northern House WrenTroglodytidae62025+140%1984
American White PelicanPelecanidae62022-14%1994
Horned LarkAlaudidae52025-22%1984
Rock PigeonColumbidae52009+400%1995
Western BluebirdTurdidae51997n/an/a
KilldeerCharadriidae42025-83%1984
Rock WrenTroglodytidae42025-29%1984
Ring-necked DuckAnatidae42016+33%2009
Cinnamon TealAnatidae32018-36%1984
Wilson's PhalaropeScolopacidae31995-40%1983
WilletScolopacidae32025-61%1984
Greater Sage-GrousePhasianidae32025+236%1984
Common RavenCorvidae32025+63%1984
Swainson's HawkAccipitridae32025+60%1996
Blue-winged TealAnatidae32022+200%1994
Red-naped SapsuckerPicidae32007+200%2005

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