BirdAnalyst
BBS Route · Colorado · BCR 16

Parlin Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 128 species recorded across 53 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 →
53Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
5Observers

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 BlackbirdIcteridae632025+11%1970
Yellow WarblerParulidae412025+1%1970
Western Wood-PeweeTyrannidae332025+433%1970
Cliff SwallowHirundinidae332025+175%1970
American RobinTurdidae332025-13%1970
Warbling VireoVireonidae312025+24%1970
Broad-tailed HummingbirdTrochilidae302025+22%1970
Rock PigeonColumbidae30198915×1983
Violet-green SwallowHirundinidae242025+71%1970
Black-billed MagpieCorvidae202025-14%1970
Tree SwallowHirundinidae202025+64%1971
Song SparrowPasserellidae172025+50%1970
Northern House WrenTroglodytidae162025+83%1970
Common GrackleIcteridae162018+250%1982
European StarlingSturnidae152025+187%1970
Brewer's BlackbirdIcteridae112025+44%1970
White-crowned SparrowPasserellidae82025+86%1970
White-breasted NuthatchSittidae82017+150%2002
Savannah SparrowPasserellidae72025+114%1970
Mountain BluebirdTurdidae72025+140%1972
American CrowCorvidae62025+180%1970
Mountain ChickadeeParidae62025+27%1972
Spotted TowheePasserellidae62018+46%1996
Steller's JayCorvidae52022+200%1970
Cassin's FinchFringillidae52018+120%1992
Wilson's PhalaropeScolopacidae41989+50%1977
Wilson's SnipeScolopacidae42025+46%1970
KilldeerCharadriidae42019-10%1970
Pine SiskinFringillidae42025-75%1970
MacGillivray's WarblerParulidae42023-25%1971
Wilson's WarblerParulidae42025-72%1970
Bank SwallowHirundinidae41983n/an/a
Canada GooseAnatidae42014+25%2004
Evening GrosbeakFringillidae41988n/an/a
Common NighthawkCaprimulgidae32023+0%1970
Western MeadowlarkIcteridae32023-77%1970
Ruby-crowned KingletRegulidae32025+8%1970
Common RavenCorvidae32025-55%1977
Brewer's SparrowPasserellidae32021+100%1985
SoraRallidae32025+100%1983

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