BirdAnalyst
BBS Route · Colorado · BCR 16

Moon Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 88 species recorded across 16 survey years, still active.

88Species 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 →
16Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2025Span
6Observers

Bird Species Found on Colorado Moon Pass

Top 40 of 88 species by most recent count. Each links to its species trend.

Species recorded on the Moon 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
American RobinTurdidae302025+41%2003
Warbling VireoVireonidae252025+104%2004
Mourning DoveColumbidae242025+13%2003
Black-billed MagpieCorvidae222025-16%2003
Green-tailed TowheePasserellidae222025+21%2004
Clark's NutcrackerCorvidae192025+108%2004
Violet-green SwallowHirundinidae182025+35%2003
Pinyon JayCorvidae182025+482%2005
Song SparrowPasserellidae172025+292%2003
Hermit ThrushTurdidae122024+29%2003
Rock PigeonColumbidae122025+273%2011
Yellow WarblerParulidae122025+38%2005
Vesper SparrowPasserellidae112025+91%2004
Broad-tailed HummingbirdTrochilidae102025+79%2003
Western Wood-PeweeTyrannidae92025+260%2005
Mountain ChickadeeParidae82025+0%2004
Cliff SwallowHirundinidae72023-64%2003
Spotted TowheePasserellidae72025+600%2019
Northern House WrenTroglodytidae62025+44%2005
Pine SiskinFringillidae52025-58%2004
Horned LarkAlaudidae52025+136%2005
BushtitAegithalidae52025+400%2003
Black-headed GrosbeakCardinalidae52025+100%2010
Common RavenCorvidae42025-20%2003
Lincoln's SparrowPasserellidae42025-5%2003
MacGillivray's WarblerParulidae42025-50%2003
Pygmy NuthatchSittidae42011+300%2000
Red-breasted NuthatchSittidae42024-25%2005
Western TanagerCardinalidae32025+200%2003
Sage ThrasherMimidae32025+0%2005
Ruby-crowned KingletRegulidae32025-34%2004
Red-winged BlackbirdIcteridae32025-14%2004
Western MeadowlarkIcteridae32025-14%2005
Great Horned OwlStrigidae32019+200%2003
White-winged CrossbillFringillidae32003n/an/a
Golden-crowned KingletRegulidae32010-25%2004
American GoldfinchFringillidae32024n/an/a
Hairy WoodpeckerPicidae22024+100%2014
Red-naped SapsuckerPicidae22025+200%2005
Chipping SparrowPasserellidae22025+0%2010

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