BirdAnalyst
BBS Route · Colorado · BCR 18

Karval Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 72 species recorded across 17 survey years, still active.

72Species 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 →
17Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1995–2025Span
4Observers

Bird Species Found on Colorado Karval

Top 40 of 72 species by most recent count. Each links to its species trend.

Species recorded on the Karval 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
Lark BuntingPasserellidae2342025-42%1998
Western MeadowlarkIcteridae1472025-33%1998
Horned LarkAlaudidae902025-68%1998
Cassin's SparrowPasserellidae622025-75%1998
Mourning DoveColumbidae382025-70%1998
Western KingbirdTyrannidae192025-52%1998
European StarlingSturnidae132025+6%2001
Green-winged TealAnatidae122014n/an/a
House SparrowPasseridae112025-46%2001
Red-winged BlackbirdIcteridae82019-11%1998
Yellow WarblerParulidae82001n/an/a
MallardAnatidae62019+100%2002
Bullock's OrioleIcteridae62025-33%2001
Brewer's SparrowPasserellidae52017-42%2001
Rock PigeonColumbidae42017-27%1998
Wilson's PhalaropeScolopacidae42017+250%2005
Blue-winged TealAnatidae42019-27%2014
Northern ShovelerAnatidae42019+100%2005
Common GrackleIcteridae32019-78%2001
American RobinTurdidae32003+167%2001
Ring-necked PheasantPhasianidae32016-40%1996
American CootRallidae32015n/an/a
Northern PintailAnatidae32019n/an/a
KilldeerCharadriidae22025-76%1998
Mountain PloverCharadriidae22025-63%1998
Red-tailed HawkAccipitridae22018+140%2001
Great Horned OwlStrigidae22018+0%1996
Brown-headed CowbirdIcteridae22025-74%1998
Grasshopper SparrowPasserellidae22025-87%1998
Lark SparrowPasserellidae22025-88%1998
Loggerhead ShrikeLaniidae22025-60%2003
Northern MockingbirdMimidae22025-34%1998
Long-billed CurlewScolopacidae21996n/an/a
Say's PhoebeTyrannidae22025-56%2002
House FinchFringillidae21996n/an/a
Blue GrosbeakCardinalidae22016-20%2002
GadwallAnatidae22016+33%2005
American AvocetRecurvirostridae22019-50%2014
Eastern KingbirdTyrannidae22017+0%2005
Golden EagleAccipitridae22014n/an/a

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