BirdAnalyst
BBS Route · Colorado · BCR 16

Gardner Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 123 species recorded across 23 survey years, still active.

123Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2025Span
3Observers

Bird Species Found on Colorado Gardner

Top 40 of 123 species by most recent count. Each links to its species trend.

Species recorded on the Gardner 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
Western MeadowlarkIcteridae412025-72%2000
Vesper SparrowPasserellidae282025-81%2000
Western Wood-PeweeTyrannidae222025-55%2000
Mourning DoveColumbidae172025-68%2000
Spotted TowheePasserellidae152025-83%2000
American RobinTurdidae132025-70%2000
Common RavenCorvidae112025-66%2000
Western TanagerCardinalidae112025-29%2000
Chipping SparrowPasserellidae102025-81%2000
Cliff SwallowHirundinidae102025-83%2000
Red-winged BlackbirdIcteridae92025-81%2000
Warbling VireoVireonidae82025-52%2000
Mountain ChickadeeParidae82025-81%2000
Pinyon JayCorvidae72025-85%2000
Plumbeous VireoVireonidae62025-33%2000
House SparrowPasseridae62001+450%1999
White-crowned SparrowPasserellidae62011n/an/a
DickcisselCardinalidae62025+500%2018
Green-tailed TowheePasserellidae52025+44%2000
Violet-green SwallowHirundinidae52025-82%2000
Mountain BluebirdTurdidae52025-90%2000
Yellow-headed BlackbirdIcteridae52021n/an/a
Band-tailed PigeonColumbidae41999+300%1998
Broad-tailed HummingbirdTrochilidae42025-71%2000
Black-billed MagpieCorvidae42025-81%2000
Grasshopper SparrowPasserellidae42002+0%2000
Evening GrosbeakFringillidae42008n/an/a
Red-tailed HawkAccipitridae32025+0%2000
American KestrelFalconidae32025-67%2000
Common NighthawkCaprimulgidae32025-80%2000
Ash-throated FlycatcherTyrannidae32025-46%2000
Brown-headed CowbirdIcteridae32025-75%2000
Barn SwallowHirundinidae32022-72%2000
Yellow WarblerParulidae32025-53%2000
Bewick's WrenTroglodytidae32007+120%2000
Northern House WrenTroglodytidae32025-67%2000
Hermit ThrushTurdidae32025-89%2000
Turkey VultureCathartidae32024+17%2010
Black-headed GrosbeakCardinalidae32025-40%2003
Blue GrosbeakCardinalidae32025-33%2007

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