BirdAnalyst
BBS Route · Colorado · BCR 18

Ellicott Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 63 species recorded across 23 survey years, still active.

63Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1994–2024Span
5Observers

Bird Species Found on Colorado Ellicott

Top 40 of 63 species by most recent count. Each links to its species trend.

Species recorded on the Ellicott 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
Western MeadowlarkIcteridae852024-50%1997
Cassin's SparrowPasserellidae572024+261%1997
Horned LarkAlaudidae492024-53%1997
House SparrowPasseridae38202416×1997
Western KingbirdTyrannidae292024+56%1997
Mourning DoveColumbidae282024-36%1997
Northern MockingbirdMimidae172024+514%1997
Rock PigeonColumbidae142024+57%1997
Mountain PloverCharadriidae11201311×2009
Eurasian Collared-DoveColumbidae102024+440%2011
European StarlingSturnidae72024+20%1997
Chipping SparrowPasserellidae72016+250%1997
Canada GooseAnatidae72017n/an/a
Cliff SwallowHirundinidae62014+129%2006
Lark BuntingPasserellidae52024-97%1997
Swainson's HawkAccipitridae42024+0%1997
Brewer's BlackbirdIcteridae42022+20%1997
Lark SparrowPasserellidae42024-20%1999
Ring-necked PheasantPhasianidae31997+50%1994
American RobinTurdidae32024-42%1997
KilldeerCharadriidae22024-70%1997
Common NighthawkCaprimulgidae22024-56%1997
Loggerhead ShrikeLaniidae22024-78%1997
MallardAnatidae22015+0%1997
Golden EagleAccipitridae21999+100%1995
Prairie FalconFalconidae22017+0%2003
House FinchFringillidae22024+14%1999
Burrowing OwlStrigidae22024-55%2007
Vesper SparrowPasserellidae22024-75%2006
Cassin's KingbirdTyrannidae22024-43%2008
Bullock's OrioleIcteridae22024+0%2006
Great-tailed GrackleIcteridae22023-33%2013
Canyon TowheePasserellidae22017n/an/a
Turkey VultureCathartidae22023+100%2018
Red-tailed HawkAccipitridae12024+0%1999
Common GrackleIcteridae12024-66%1997
Grasshopper SparrowPasserellidae12023-80%2003
Barn SwallowHirundinidae12022-87%1997
Yellow WarblerParulidae12010+0%1994
Scaled QuailOdontophoridae12022-11%2006

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.