BirdAnalyst
BBS Route · Colorado · BCR 18

Flagler Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 65 species recorded across 19 survey years, still active.

65Species 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 →
19Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1997–2025Span
3Observers

Bird Species Found on Colorado Flagler

Top 40 of 65 species by most recent count. Each links to its species trend.

Species recorded on the Flagler 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
Rock PigeonColumbidae1392025+431%2002
Western MeadowlarkIcteridae1222025-34%2001
Mourning DoveColumbidae1152025-8%2001
Horned LarkAlaudidae952025-17%2001
Lark BuntingPasserellidae832025-36%2001
House SparrowPasseridae682025+17%2001
European StarlingSturnidae612025+267%2001
Red-winged BlackbirdIcteridae552025-32%2001
Common GrackleIcteridae412025+26%2001
Eurasian Collared-DoveColumbidae31202511×2006
Western KingbirdTyrannidae222025-35%2001
American RobinTurdidae162025-10%2001
KilldeerCharadriidae102025-32%2001
DickcisselCardinalidae102025+78%2007
Great-tailed GrackleIcteridae92025+33%2001
Blue-winged TealAnatidae82023-11%2007
Brown-headed CowbirdIcteridae72025+14%2001
Turkey VultureCathartidae72025+60%2019
Canada GooseAnatidae62025+500%2012
Swainson's HawkAccipitridae42025-11%2001
Barn SwallowHirundinidae42025+0%2001
Say's PhoebeTyrannidae42025-33%2004
Yellow-headed BlackbirdIcteridae42003+100%2002
Northern ShovelerAnatidae42009n/an/a
Great Blue HeronArdeidae32003+200%1997
Northern MockingbirdMimidae32025+18%2003
Red-tailed HawkAccipitridae32025+17%2005
White-faced IbisThreskiornithidae32012n/an/a
Ring-necked PheasantPhasianidae22025-87%2001
Burrowing OwlStrigidae22024+60%2002
Grasshopper SparrowPasserellidae22025-95%2001
Lark SparrowPasserellidae22022-59%2003
Northern Rough-winged SwallowHirundinidae22007-20%2000
Green-winged TealAnatidae22023+0%2000
Northern PintailAnatidae22003+100%2000
Cliff SwallowHirundinidae22025-80%2007
Great Horned OwlStrigidae22022+50%2006
American GoldfinchFringillidae22007n/an/a
Blue GrosbeakCardinalidae22024+100%2023
MallardAnatidae12025-89%2001

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