BirdAnalyst
BBS Route · Colorado · BCR 16

Dolores Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 115 species recorded across 17 survey years, no longer active.

115Species 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 →
17Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–1987Span
5Observers

Bird Species Found on Colorado Dolores

Top 40 of 115 species by most recent count. Each links to its species trend.

Species recorded on the Dolores 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
Barn SwallowHirundinidae1591987+389%1971
Red-winged BlackbirdIcteridae1231987-34%1971
Cliff SwallowHirundinidae771985+14%1971
Brewer's BlackbirdIcteridae551987+43%1971
American RobinTurdidae311987+48%1971
Bullock's OrioleIcteridae261987+224%1971
Brown-headed CowbirdIcteridae261987+760%1972
Western MeadowlarkIcteridae231987-47%1971
European StarlingSturnidae221987+104%1971
KilldeerCharadriidae211987+221%1971
Black-billed MagpieCorvidae191987-28%1971
Western KingbirdTyrannidae181987+717%1971
Bank SwallowHirundinidae181974n/an/a
Band-tailed PigeonColumbidae131975-50%1968
Pinyon JayCorvidae121987+347%1971
House FinchFringillidae101987-28%1971
Yellow WarblerParulidae101987-32%1971
Blue GrosbeakCardinalidae91982+0%1971
Olive-sided FlycatcherTyrannidae91969n/an/a
Canada GooseAnatidae81987+92%1984
Mourning DoveColumbidae71987-13%1971
Northern Rough-winged SwallowHirundinidae71987+206%1971
Tree SwallowHirundinidae61987+70%1978
House SparrowPasseridae61987-16%1972
Green-tailed TowheePasserellidae61987+167%1974
Ring-necked PheasantPhasianidae51985+18%1971
American CrowCorvidae51987-40%1971
American GoldfinchFringillidae51987+80%1971
Common RavenCorvidae51987+133%1974
Song SparrowPasserellidae51987+27%1973
Ruddy DuckAnatidae51984+25%1974
Lewis's WoodpeckerPicidae41984+133%1972
Bewick's WrenTroglodytidae41979+300%1968
Turkey VultureCathartidae41987+300%1973
Gray CatbirdMimidae41982+50%1975
White-breasted NuthatchSittidae41979+25%1977
Great-tailed GrackleIcteridae41987+133%1983
American CootRallidae31987+17%1971
Cassin's KingbirdTyrannidae31972+200%1968
Say's PhoebeTyrannidae31985+100%1971

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