BirdAnalyst
BBS Route · Colorado · BCR 16

Parlin Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 128 species recorded across 52 survey years, still active.

128Species 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 →
52Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2023Span
4Observers

Bird Species Found on Colorado Parlin

Top 40 of 128 species by most recent count. Each links to its species trend.

Species recorded on the Parlin 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
Red-winged BlackbirdIcteridae342023-3%1970
American RobinTurdidae342023-21%1970
Rock PigeonColumbidae30198915×1983
Violet-green SwallowHirundinidae262023+32%1970
European StarlingSturnidae182023+140%1970
Common GrackleIcteridae162018+250%1982
Broad-tailed HummingbirdTrochilidae152023-2%1970
Yellow WarblerParulidae152023-28%1970
Northern House WrenTroglodytidae142023+65%1970
Western Wood-PeweeTyrannidae132023+275%1970
Warbling VireoVireonidae122023-27%1970
Savannah SparrowPasserellidae112023+107%1970
Black-billed MagpieCorvidae102023-24%1970
Song SparrowPasserellidae102023+8%1970
Lincoln's SparrowPasserellidae82023+0%1970
Cliff SwallowHirundinidae82023+194%1970
White-breasted NuthatchSittidae82017+150%2002
Spotted TowheePasserellidae62018+46%1996
Wilson's SnipeScolopacidae52023+73%1970
Steller's JayCorvidae52022+200%1970
Pine SiskinFringillidae52023-62%1970
Mountain ChickadeeParidae52023+0%1972
Ruby-crowned KingletRegulidae52023+62%1970
Cassin's FinchFringillidae52018+120%1992
Swainson's ThrushTurdidae52022+50%1978
Wilson's PhalaropeScolopacidae41989+50%1977
KilldeerCharadriidae42019-10%1970
MacGillivray's WarblerParulidae42023-25%1971
Bank SwallowHirundinidae41983n/an/a
Canada GooseAnatidae42014+25%2004
Evening GrosbeakFringillidae41988n/an/a
Mourning DoveColumbidae32023+89%1970
Common NighthawkCaprimulgidae32023+0%1970
American CrowCorvidae32023+200%1970
Western MeadowlarkIcteridae32023-77%1970
White-crowned SparrowPasserellidae32023+14%1970
Wilson's WarblerParulidae32022-83%1970
Brewer's SparrowPasserellidae32021+100%1985
Hairy WoodpeckerPicidae32023+67%1992
Common MerganserAnatidae32023+57%1984

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