BirdAnalyst
BBS Route · Colorado · BCR 18

Last Chance 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 49 species recorded across 7 survey years, still active.

49Species 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 →
7Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2017–2025Span
2Observers

Bird Species Found on Colorado Last Chance 2

Top 40 of 49 species by most recent count. Each links to its species trend.

Species recorded on the Last Chance 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 LarkAlaudidae2892025-4%2019
Western MeadowlarkIcteridae2002025-2%2019
Lark BuntingPasserellidae982025-12%2019
Red-winged BlackbirdIcteridae622025-16%2019
Mourning DoveColumbidae532025-29%2019
Western KingbirdTyrannidae172025-25%2019
European StarlingSturnidae112025+3%2021
Common GrackleIcteridae112024-31%2018
House SparrowPasseridae112025+400%2019
Red-tailed HawkAccipitridae92025+7%2019
Yellow-headed BlackbirdIcteridae82021+100%2017
Say's PhoebeTyrannidae72025+46%2019
American RobinTurdidae72024+300%2021
Burrowing OwlStrigidae62025-24%2019
Lark SparrowPasserellidae62025+44%2019
Loggerhead ShrikeLaniidae62024-50%2019
Brown-headed CowbirdIcteridae62025+75%2019
DickcisselCardinalidae52025n/an/a
Cassin's SparrowPasserellidae42025+0%2022
Northern HarrierAccipitridae32024+138%2019
Swainson's HawkAccipitridae32025-47%2019
Bullock's OrioleIcteridae32025+40%2019
Lesser GoldfinchFringillidae32025+50%2018
MallardAnatidae32024+50%2019
Ferruginous HawkAccipitridae32022n/an/a
KilldeerCharadriidae22025+0%2018
American KestrelFalconidae22024+0%2018
Eastern KingbirdTyrannidae22025+0%2019
Common NighthawkCaprimulgidae22025n/an/a
Thick-billed LongspurCalcariidae22025n/an/a
Song SparrowPasserellidae22025n/an/a
Ring-necked PheasantPhasianidae12019+0%2017
Grasshopper SparrowPasserellidae12025-75%2019
Brewer's SparrowPasserellidae12018-80%2017
Barn SwallowHirundinidae12025-72%2019
Gray CatbirdMimidae12017n/an/a
Brown ThrasherMimidae12019-67%2017
Eurasian Collared-DoveColumbidae12024-29%2018
Orchard OrioleIcteridae12024+0%2018
Brewer's BlackbirdIcteridae12025-62%2019

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