BirdAnalyst
BBS Route · Colorado · BCR 18

Pinneo Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 72 species recorded across 42 survey years, still active.

72Species 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2025Span
8Observers

Bird Species Found on Colorado Pinneo

Top 40 of 72 species by most recent count. Each links to its species trend.

Species recorded on the Pinneo 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 MeadowlarkIcteridae1792025+64%1975
Horned LarkAlaudidae1072025-12%1975
Mourning DoveColumbidae772025+22%1975
Cassin's SparrowPasserellidae422025-17%1975
Lark BuntingPasserellidae352025-89%1975
House SparrowPasseridae192025+457%1976
DickcisselCardinalidae192018+417%1997
Lark SparrowPasserellidae172025+118%1976
Western KingbirdTyrannidae132025+74%1975
Grasshopper SparrowPasserellidae112025+103%1975
Brown-headed CowbirdIcteridae92025+160%1979
Common GrackleIcteridae92025+62%1977
Chestnut-collared LongspurCalcariidae62016-57%1973
Cliff SwallowHirundinidae62019+250%1995
American GoldfinchFringillidae62019+167%1999
Brewer's BlackbirdIcteridae51977+67%1976
American AvocetRecurvirostridae41974n/an/a
Ferruginous HawkAccipitridae42025+200%1988
Long-billed CurlewScolopacidae31994+33%1976
Ring-necked PheasantPhasianidae32025+125%1976
Burrowing OwlStrigidae32019-54%1977
Red-winged BlackbirdIcteridae32025-39%1975
Bullock's OrioleIcteridae32025+300%1977
Blue-winged TealAnatidae31981n/an/a
Turkey VultureCathartidae32010n/an/a
Great Blue HeronArdeidae21993+0%1975
KilldeerCharadriidae22025+171%1975
Red-headed WoodpeckerPicidae22009+50%1990
Common NighthawkCaprimulgidae22025-33%1977
Black-billed MagpieCorvidae22010-60%1983
European StarlingSturnidae22025+25%1975
Barn SwallowHirundinidae22025+17%1975
Eastern KingbirdTyrannidae22016+0%1980
Great Horned OwlStrigidae22018+25%1982
Northern PintailAnatidae21979n/an/a
Baltimore OrioleIcteridae21979n/an/a
Northern HarrierAccipitridae22018+0%1985
Short-eared OwlStrigidae21980n/an/a
Western Wood-PeweeTyrannidae22007+50%1983
MallardAnatidae12003-33%1979

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