BirdAnalyst
BBS Route · Colorado · BCR 16

Lost Lake Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 100 species recorded across 27 survey years, still active.

100Species 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 →
27Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1990–2025Span
5Observers

Bird Species Found on Colorado Lost Lake

Top 40 of 100 species by most recent count. Each links to its species trend.

Species recorded on the Lost Lake 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
American RobinTurdidae322025-36%1994
Broad-tailed HummingbirdTrochilidae302025+35%1994
Ruby-crowned KingletRegulidae252025-6%1994
Warbling VireoVireonidae232025+12%1994
Cliff SwallowHirundinidae202025-24%1995
Lincoln's SparrowPasserellidae182025+117%1995
Vesper SparrowPasserellidae17202512×1995
Tree SwallowHirundinidae162025+115%1994
Western Wood-PeweeTyrannidae102025+300%1994
Wilson's WarblerParulidae102025+36%1994
Mountain ChickadeeParidae102025+81%1994
Dusky FlycatcherTyrannidae92025+8%1994
Violet-green SwallowHirundinidae92024+147%1995
Pine SiskinFringillidae82025-28%1994
Western TanagerCardinalidae82025+160%2001
Northern House WrenTroglodytidae82025+167%1995
Red-naped SapsuckerPicidae72025+200%1994
Mourning DoveColumbidae62025+138%2002
American CrowCorvidae62025-44%1994
Hammond's FlycatcherTyrannidae62025+300%1996
White-crowned SparrowPasserellidae62025+215%1995
Hermit ThrushTurdidae52025-24%1994
Black-billed MagpieCorvidae52025+350%1996
Band-tailed PigeonColumbidae52025+200%2001
MacGillivray's WarblerParulidae42025+0%1999
Mountain BluebirdTurdidae42025+11%1994
Western MeadowlarkIcteridae42024+150%1996
Green-tailed TowheePasserellidae42025+280%1999
Olive-sided FlycatcherTyrannidae42025+120%2001
Steller's JayCorvidae42024+0%2000
California GullLaridae42010+250%2002
Song SparrowPasserellidae32025-22%1994
Northern Rough-winged SwallowHirundinidae32022-25%1990
Red-breasted NuthatchSittidae32025+86%1994
American KestrelFalconidae32024+0%2003
Wilson's SnipeScolopacidae32025-36%1996
Brewer's BlackbirdIcteridae32025+125%1999
Common GrackleIcteridae32006+0%2001
Brewer's SparrowPasserellidae32025-29%2001
Fox SparrowPasserellidae32025+133%2012

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