BirdAnalyst
BBS Route · Colorado · BCR 18

Prospect Valley 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 58 species recorded across 23 survey years, still active.

58Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2001–2025Span
3Observers

Bird Species Found on Colorado Prospect Valley 2

Top 40 of 58 species by most recent count. Each links to its species trend.

Species recorded on the Prospect Valley 2 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 LarkAlaudidae2122025+124%2003
Western MeadowlarkIcteridae1722025+92%2003
Red-winged BlackbirdIcteridae1402025+50%2003
Mourning DoveColumbidae1122025-10%2003
Lark BuntingPasserellidae842025-64%2003
Northern PintailAnatidae502008n/an/a
Western KingbirdTyrannidae482025-63%2003
Common GrackleIcteridae182025-76%2003
European StarlingSturnidae172025-19%2003
House SparrowPasseridae162025-36%2003
American RobinTurdidae142025-22%2003
Eurasian Collared-DoveColumbidae102025+69%2012
Great-tailed GrackleIcteridae92010-74%2001
Canada GooseAnatidae72021+73%2016
House FinchFringillidae62025-58%2003
Cassin's SparrowPasserellidae62019+500%2017
MallardAnatidae52025-28%2003
KilldeerCharadriidae52025-27%2003
Rock PigeonColumbidae52023+131%2005
Grasshopper SparrowPasserellidae42025-33%2003
Swainson's HawkAccipitridae42025-38%2004
Burrowing OwlStrigidae42023-46%2009
Brown-headed CowbirdIcteridae42025+333%2015
Northern HarrierAccipitridae32022-11%2005
Brewer's BlackbirdIcteridae32025-50%2003
Lark SparrowPasserellidae32025+50%2004
Barn SwallowHirundinidae32025+75%2004
Loggerhead ShrikeLaniidae32023-76%2003
Red-tailed HawkAccipitridae22025+14%2008
Great Horned OwlStrigidae22023-50%2003
Bullock's OrioleIcteridae22025+20%2005
Northern MockingbirdMimidae22025+33%2004
Northern House WrenTroglodytidae22021+150%2002
Say's PhoebeTyrannidae22025+33%2008
White-winged DoveColumbidae22011n/an/a
Vesper SparrowPasserellidae22018n/an/a
Ferruginous HawkAccipitridae12019+0%2002
Golden EagleAccipitridae12004+0%2001
Prairie FalconFalconidae12015+0%2002
Eastern KingbirdTyrannidae12018+0%2004

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