BirdAnalyst
BBS Route · Colorado · BCR 16

Lizard Head Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 77 species recorded across 20 survey years, still active.

77Species 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 →
20Years 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
4Observers

Bird Species Found on Colorado Lizard Head Pass

Top 40 of 77 species by most recent count. Each links to its species trend.

Species recorded on the Lizard Head Pass 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
Canada GooseAnatidae422025+480%2022
American RobinTurdidae362025+23%2003
Pine SiskinFringillidae202025+68%2004
White-crowned SparrowPasserellidae162025+2%2003
Lincoln's SparrowPasserellidae132025+32%2003
Warbling VireoVireonidae132025-3%2003
Western TanagerCardinalidae122025+50%2003
Hermit ThrushTurdidae112025+158%2003
American CrowCorvidae102025-6%2003
Song SparrowPasserellidae102025+80%2004
Western Wood-PeweeTyrannidae92025+440%2003
Red-winged BlackbirdIcteridae82025+89%2003
Chipping SparrowPasserellidae82025+69%2003
Common RavenCorvidae72024-6%2003
Black-billed MagpieCorvidae62025-39%2003
Ruby-crowned KingletRegulidae62025-34%2003
Tree SwallowHirundinidae62025-69%2009
House SparrowPasseridae62024+50%2018
White-throated SwiftApodidae52015-21%2002
Broad-tailed HummingbirdTrochilidae52025-50%2003
Steller's JayCorvidae52025+17%2003
Violet-green SwallowHirundinidae52025+14%2003
Mountain ChickadeeParidae52024+117%2003
Red CrossbillFringillidae42024+100%2018
Fox SparrowPasserellidae32025-36%2003
MacGillivray's WarblerParulidae32025-40%2003
Wilson's WarblerParulidae32024-76%2006
Swainson's ThrushTurdidae32025-33%2007
Spotted TowheePasserellidae32024+25%2004
Black-headed GrosbeakCardinalidae32025+50%2006
Dusky FlycatcherTyrannidae22025-14%2007
Brown-headed CowbirdIcteridae22024-20%2010
Cassin's FinchFringillidae22025-43%2007
Virginia's WarblerParulidae22024-30%2003
Yellow WarblerParulidae22025-75%2003
Northern House WrenTroglodytidae22025+183%2003
Wilson's SnipeScolopacidae22025-54%2004
Red-tailed HawkAccipitridae22025-17%2008
Hammond's FlycatcherTyrannidae22025+14%2006
Canada JayCorvidae22003n/an/a

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