BirdAnalyst
BBS Route · Colorado · BCR 16

Groundhog Rs Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 119 species recorded across 32 survey years, still active.

119Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2025Span
6Observers

Bird Species Found on Colorado Groundhog Rs

Top 40 of 119 species by most recent count. Each links to its species trend.

Species recorded on the Groundhog Rs 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 RobinTurdidae432025-1%1994
Warbling VireoVireonidae332025+18%1994
Pine SiskinFringillidae232025-57%1994
Ruby-crowned KingletRegulidae212025+26%1994
European StarlingSturnidae162024+4%1994
Western TanagerCardinalidae162025+390%1997
Brewer's BlackbirdIcteridae152025-70%1994
Violet-green SwallowHirundinidae142025-40%1994
White-crowned SparrowPasserellidae102025-13%1994
Western Wood-PeweeTyrannidae92025-27%1994
Northern House WrenTroglodytidae92025+190%1994
Evening GrosbeakFringillidae82019+89%2010
Western MeadowlarkIcteridae72025-29%1994
Vesper SparrowPasserellidae72025+75%1995
Canada GooseAnatidae72025-33%2003
Steller's JayCorvidae62025+433%1995
Lincoln's SparrowPasserellidae62025+0%1996
Yellow WarblerParulidae62025-17%1994
American CootRallidae61993n/an/a
Green-tailed TowheePasserellidae52025-42%1994
Hermit ThrushTurdidae52025-67%1994
Red-naped SapsuckerPicidae42025+114%2000
Dusky FlycatcherTyrannidae42025+0%1997
Black-headed GrosbeakCardinalidae42025+14%1997
Red CrossbillFringillidae42024-50%2005
Hammond's FlycatcherTyrannidae32025-75%1995
Fox SparrowPasserellidae32025-33%1997
Wilson's WarblerParulidae32025-68%1994
Mountain ChickadeeParidae32025-8%1994
American KestrelFalconidae32023+33%1996
Green-winged TealAnatidae32004+50%1994
Cinnamon TealAnatidae31998+200%1994
MacGillivray's WarblerParulidae32025+75%1997
Common MerganserAnatidae32016+100%2000
Western GrebePodicipedidae32025+25%2006
American Three-toed WoodpeckerPicidae32025+100%2012
House FinchFringillidae32024+0%2006
Western BluebirdTurdidae32012+50%2007
Say's PhoebeTyrannidae32024n/an/a
KilldeerCharadriidae22015+50%1995

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