BirdAnalyst
BBS Route · Utah · BCR 16

Boulder Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 114 species recorded across 40 survey years, still active.

114Species 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 →
1968–2025Span
8Observers

Bird Species Found on Utah Boulder

Top 40 of 114 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
Cliff SwallowHirundinidae672025+68%1971
Mourning DoveColumbidae162025+186%1971
Violet-green SwallowHirundinidae152025-9%1986
Ash-throated FlycatcherTyrannidae132025-23%1987
Common RavenCorvidae122025+71%1986
Blue-gray GnatcatcherPolioptilidae122025-45%1990
BushtitAegithalidae92025-31%1989
Woodhouse's Scrub-JayCorvidae92025-67%1988
MallardAnatidae92025+233%2012
Yellow-headed BlackbirdIcteridae72025+67%1987
White-throated SwiftApodidae72025-63%1987
Eurasian Collared-DoveColumbidae72025-8%2014
Turkey VultureCathartidae62025+122%1989
Brewer's BlackbirdIcteridae62025-84%1974
House FinchFringillidae62025+0%1987
Western MeadowlarkIcteridae52025+63%1971
Song SparrowPasserellidae52025+0%1986
House SparrowPasseridae52025-46%2004
Spotted TowheePasserellidae52025-38%1989
American CootRallidae52025+33%1992
Pinyon JayCorvidae42025-62%1971
Bullock's OrioleIcteridae42025+50%1989
American RobinTurdidae42025+0%1971
Gray VireoVireonidae42025+14%1993
Sagebrush SparrowPasserellidae42003-25%1993
Rock PigeonColumbidae41993n/an/a
Western KingbirdTyrannidae42025+29%1995
Black-chinned HummingbirdTrochilidae42025+50%1998
Red-winged BlackbirdIcteridae32025-52%1974
Cinnamon TealAnatidae32011+200%1971
Common NighthawkCaprimulgidae32025-71%1988
Yellow WarblerParulidae32025+50%1989
Rock WrenTroglodytidae32025-53%1987
Northern Rough-winged SwallowHirundinidae32012-25%1990
Pine SiskinFringillidae32019+200%1989
Gambel's QuailOdontophoridae31990n/an/a
Common GrackleIcteridae32014+50%2004
Canyon WrenTroglodytidae22025-40%1971
Mountain BluebirdTurdidae22025+120%1986
Black-billed MagpieCorvidae22025-8%1974

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