BirdAnalyst
BBS Route · Colorado · BCR 16

Dolores Riv Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 106 species recorded across 34 survey years, still active.

106Species 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 →
34Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1988–2024Span
3Observers

Bird Species Found on Colorado Dolores Riv

Top 40 of 106 species by most recent count. Each links to its species trend.

Species recorded on the Dolores Riv 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
American RobinTurdidae1142024-4%1992
Warbling VireoVireonidae762024+8%1992
Violet-green SwallowHirundinidae592024-36%1992
Western TanagerCardinalidae402024+52%1992
Ruby-crowned KingletRegulidae402024+120%1992
Western Wood-PeweeTyrannidae192024-73%1992
Pine SiskinFringillidae182024-85%1992
Broad-tailed HummingbirdTrochilidae152024-24%1992
Hermit ThrushTurdidae142024-4%1992
Lincoln's SparrowPasserellidae102024+100%1993
Orange-crowned WarblerParulidae102024-23%1995
MacGillivray's WarblerParulidae102024+267%1992
American GoldfinchFringillidae102017+900%2012
White-crowned SparrowPasserellidae82024-81%1992
Song SparrowPasserellidae82024+31%1992
Hammond's FlycatcherTyrannidae82024-20%1995
Dusky FlycatcherTyrannidae62024+300%1997
Black-billed MagpieCorvidae62024+46%1992
Red-winged BlackbirdIcteridae62023-9%1994
Fox SparrowPasserellidae62024-48%1994
Yellow WarblerParulidae62024-66%1992
Northern House WrenTroglodytidae62024-35%1992
Mountain BluebirdTurdidae62024+88%1995
Spotted SandpiperScolopacidae62024-44%1996
European StarlingSturnidae52019-46%1992
Chipping SparrowPasserellidae52024-53%1992
Black-headed GrosbeakCardinalidae52024+0%1992
Tree SwallowHirundinidae52024-41%1996
Virginia's WarblerParulidae52024-48%1994
White-throated SwiftApodidae51995n/an/a
Blue-gray GnatcatcherPolioptilidae51997n/an/a
Common RavenCorvidae42024+60%1993
Evening GrosbeakFringillidae42021+0%1998
Mountain ChickadeeParidae42024+150%1992
Golden-crowned KingletRegulidae42004+50%1992
Band-tailed PigeonColumbidae42002-33%1998
Cedar WaxwingBombycillidae42005+300%1999
Black SwiftApodidae42015n/an/a
Red-tailed HawkAccipitridae32024+40%1994
Olive-sided FlycatcherTyrannidae32024-52%1992

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