BirdAnalyst
BBS Route · Colorado · BCR 16

Blanca Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 51 species recorded across 8 survey years, no longer active.

51Species 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 →
8Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1979–1987Span
4Observers

Bird Species Found on Colorado Blanca

Top 40 of 51 species by most recent count. Each links to its species trend.

Species recorded on the Blanca 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
Horned LarkAlaudidae921987+13%1981
Sage ThrasherMimidae241987+20%1981
Vesper SparrowPasserellidae231987+242%1983
Brewer's BlackbirdIcteridae181987+120%1981
Brewer's SparrowPasserellidae171987+130%1983
Mourning DoveColumbidae161987+2%1981
Common RavenCorvidae131987+78%1984
Western MeadowlarkIcteridae91987-15%1981
Red-winged BlackbirdIcteridae81987+100%1981
Ring-necked PheasantPhasianidae51986+67%1985
Ferruginous HawkAccipitridae31986+100%1984
Common NighthawkCaprimulgidae31987-67%1983
Violet-green SwallowHirundinidae31986-50%1981
KilldeerCharadriidae31987+200%1985
MallardAnatidae31987n/an/a
Golden EagleAccipitridae21987+29%1981
Burrowing OwlStrigidae21986-50%1979
Say's PhoebeTyrannidae21987+0%1983
Red-tailed HawkAccipitridae21986+150%1984
Prairie FalconFalconidae21981n/an/a
Song SparrowPasserellidae21987-63%1984
Cliff SwallowHirundinidae21986+100%1981
Tree SwallowHirundinidae21984-67%1981
Yellow WarblerParulidae21987+50%1984
Pinyon JayCorvidae21987+100%1985
Spotted SandpiperScolopacidae21986n/an/a
Chipping SparrowPasserellidae21986n/an/a
Wilson's SnipeScolopacidae11979n/an/a
Mountain PloverCharadriidae11983-93%1979
Swainson's HawkAccipitridae11987-38%1984
American KestrelFalconidae11987-43%1983
Black-billed MagpieCorvidae11987+18%1983
American CrowCorvidae11987-71%1980
Barn SwallowHirundinidae11987-17%1984
Northern Rough-winged SwallowHirundinidae11987-50%1979
American RobinTurdidae11987-25%1980
Black-crowned Night HeronArdeidae11980n/an/a
Lark BuntingPasserellidae11983+0%1980
Northern HarrierAccipitridae11981n/an/a
Eastern KingbirdTyrannidae11981n/an/a

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