BirdAnalyst
BBS Route · Colorado · BCR 18

Trinchera Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 82 species recorded across 26 survey years, still active.

82Species 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 →
26Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1990–2022Span
4Observers

Bird Species Found on Colorado Trinchera

Top 40 of 82 species by most recent count. Each links to its species trend.

Species recorded on the Trinchera 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 SwallowHirundinidae4052022-15%1993
Lark SparrowPasserellidae1692022-2%1993
Western MeadowlarkIcteridae1422022-10%1993
Northern MockingbirdMimidae1412022+723%1993
Cassin's SparrowPasserellidae242022-37%1993
Mourning DoveColumbidae192022-20%1993
Wild TurkeyPhasianidae182019+600%2011
Blue GrosbeakCardinalidae172022+267%1997
Horned LarkAlaudidae152022-44%1993
Common RavenCorvidae102022+11%1993
Spotted TowheePasserellidae92022-56%1993
Barn SwallowHirundinidae92022+0%1995
Say's PhoebeTyrannidae82022+61%1994
Bullock's OrioleIcteridae82022+15%1996
House FinchFringillidae72022+150%1994
Lark BuntingPasserellidae72019+147%1994
Yellow-breasted ChatIcteriidae72022+250%2019
Red-tailed HawkAccipitridae62022+20%1993
Western Wood-PeweeTyrannidae62022+300%1995
Pinyon JayCorvidae62021-79%1994
Ash-throated FlycatcherTyrannidae52022+167%2006
Common NighthawkCaprimulgidae42022-85%1993
Western KingbirdTyrannidae42022+13%1997
Turkey VultureCathartidae42021+300%1994
Yellow WarblerParulidae42022+400%2018
Burrowing OwlStrigidae42022+300%2018
American KestrelFalconidae32022-25%1993
Black-billed MagpieCorvidae32021+0%2000
Brown-headed CowbirdIcteridae32022-45%1995
Common GrackleIcteridae32021-53%2001
Brewer's BlackbirdIcteridae32021-82%1994
Yellow-headed BlackbirdIcteridae31993n/an/a
Golden EagleAccipitridae32000+50%1999
Mountain BluebirdTurdidae32021+133%2004
Chihuahuan RavenCorvidae32021+50%2018
Great Horned OwlStrigidae22021-50%1990
Cassin's KingbirdTyrannidae22022+25%1993
Woodhouse's Scrub-JayCorvidae22022+67%1994
American CrowCorvidae22018-57%1993
European StarlingSturnidae22022+367%1993

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