BirdAnalyst
BBS Route · Colorado · BCR 18

Prospect Val Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 53 species recorded across 9 survey years, no longer active.

53Species 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 →
9Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2000Span
1Observers

Bird Species Found on Colorado Prospect Val

Top 40 of 53 species by most recent count. Each links to its species trend.

Species recorded on the Prospect Val 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 LarkAlaudidae2792000+7%1994
Red-winged BlackbirdIcteridae2532000+90%1994
Mourning DoveColumbidae2312000+11%1994
Western KingbirdTyrannidae1722000+54%1994
House SparrowPasseridae1632000-61%1994
Western MeadowlarkIcteridae932000+16%1994
Common GrackleIcteridae652000-27%1994
European StarlingSturnidae442000-30%1994
Black-billed MagpieCorvidae252000+26%1994
Barn SwallowHirundinidae222000+67%1994
American RobinTurdidae222000+63%1994
Loggerhead ShrikeLaniidae142000+94%1994
Bank SwallowHirundinidae111992n/an/a
Eastern KingbirdTyrannidae101999+58%1994
KilldeerCharadriidae92000+8%1994
Lark BuntingPasserellidae92000-47%1995
House FinchFringillidae82000-63%1995
Canada GooseAnatidae81999n/an/a
Bullock's OrioleIcteridae62000-19%1994
Brewer's BlackbirdIcteridae62000-11%1994
Rock WrenTroglodytidae51995n/an/a
MallardAnatidae42000-21%1994
Swainson's HawkAccipitridae42000-14%1994
Burrowing OwlStrigidae41999+67%1993
American White PelicanPelecanidae41999n/an/a
Northern HarrierAccipitridae32000+13%1994
Great Horned OwlStrigidae32000+40%1994
Blue-winged TealAnatidae31999+200%1993
Ferruginous HawkAccipitridae31993n/an/a
Say's PhoebeTyrannidae32000+200%1993
Brown ThrasherMimidae32000+20%1997
Rock PigeonColumbidae22000-65%1994
Grasshopper SparrowPasserellidae22000-50%1994
Great Blue HeronArdeidae21998+100%1995
Cliff SwallowHirundinidae21995+100%1993
GadwallAnatidae21999n/an/a
Ring-necked PheasantPhasianidae12000-33%1994
American KestrelFalconidae11999-75%1992
Common NighthawkCaprimulgidae11992n/an/a
Western Wood-PeweeTyrannidae11999-20%1993

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