BirdAnalyst
BBS Route · Colorado · BCR 18

Timpas Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 64 species recorded across 18 survey years, still active.

64Species 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 →
18Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1995–2019Span
4Observers

Bird Species Found on Colorado Timpas

Top 40 of 64 species by most recent count. Each links to its species trend.

Species recorded on the Timpas 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
Horned LarkAlaudidae1542019-45%1998
Western MeadowlarkIcteridae1082019-54%1998
Cassin's SparrowPasserellidae742019+12%1998
Mourning DoveColumbidae272019-3%1998
Common GrackleIcteridae272019-19%1998
Cliff SwallowHirundinidae252013+32%2001
Lark BuntingPasserellidae182019-46%1998
House SparrowPasseridae152019+27%2006
Yellow-headed BlackbirdIcteridae152013+400%2003
Northern MockingbirdMimidae132019+24%1998
European StarlingSturnidae122019+100%2000
Rock PigeonColumbidae112019+31%1998
Chihuahuan RavenCorvidae102019+260%1998
Turkey VultureCathartidae92013+67%2000
Western KingbirdTyrannidae72019-46%1998
House FinchFringillidae72019+129%2005
Lark SparrowPasserellidae72019-48%1998
Barn SwallowHirundinidae72019-5%1998
Swainson's HawkAccipitridae62019-29%2000
Burrowing OwlStrigidae62019+220%1998
Chipping SparrowPasserellidae62006n/an/a
Bullock's OrioleIcteridae52019-38%1998
Brown ThrasherMimidae52010+150%2000
Say's PhoebeTyrannidae42019+0%2006
Grasshopper SparrowPasserellidae42019-61%1998
Red-winged BlackbirdIcteridae42019-45%2001
Short-eared OwlStrigidae42005n/an/a
KilldeerCharadriidae32019+20%1998
Ash-throated FlycatcherTyrannidae32013-25%1995
Brown-headed CowbirdIcteridae32013+100%2001
Brewer's BlackbirdIcteridae32006-25%2000
Rock WrenTroglodytidae32014+200%2003
Common NighthawkCaprimulgidae22019-11%1998
Cassin's KingbirdTyrannidae22019+120%2008
Eastern KingbirdTyrannidae22009+100%1997
Northern HarrierAccipitridae22006+0%2000
Blue-winged TealAnatidae22006+0%2000
American CrowCorvidae22003-33%2000
Northern Rough-winged SwallowHirundinidae22000n/an/a
American AvocetRecurvirostridae22015+100%2008

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