BirdAnalyst
BBS Route · Colorado · BCR 18

Waverly Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 64 species recorded across 32 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1988–2019Span
4Observers

Bird Species Found on Colorado Waverly

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

Species recorded on the Waverly 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 MeadowlarkIcteridae1592019+18%1990
Common GrackleIcteridae582019+440%1990
Mourning DoveColumbidae502019+31%1990
Horned LarkAlaudidae502019-42%1990
Red-winged BlackbirdIcteridae392019+45%1990
Grasshopper SparrowPasserellidae272019-26%1990
Ring-necked PheasantPhasianidae242019+80%1990
Western KingbirdTyrannidae192019+147%1990
Lark BuntingPasserellidae192019-86%1990
Blue GrosbeakCardinalidae152019+550%1990
Eurasian Collared-DoveColumbidae152018+567%2008
American RobinTurdidae132019+169%1992
European StarlingSturnidae112017+14%1995
House SparrowPasseridae102019-69%1990
Northern PintailAnatidae102018+400%1998
Lark SparrowPasserellidae92019+73%1990
Cassin's SparrowPasserellidae92019-32%1990
Brown-headed CowbirdIcteridae72019+720%1991
KilldeerCharadriidae62019-24%1990
Common NighthawkCaprimulgidae62018+0%1995
American AvocetRecurvirostridae62007+200%1993
Bullock's OrioleIcteridae52018+117%1993
Barn SwallowHirundinidae52019+195%1990
Loggerhead ShrikeLaniidae52018+75%1992
Rock PigeonColumbidae52019-55%2004
Wild TurkeyPhasianidae52019+67%2009
Upland SandpiperScolopacidae42018-33%1990
American KestrelFalconidae42014+40%1994
Cliff SwallowHirundinidae42019+100%2003
Blue-winged TealAnatidae42018+300%1991
House FinchFringillidae42016-40%2011
Brewer's BlackbirdIcteridae32018-29%1996
DickcisselCardinalidae3201931×1992
Northern HarrierAccipitridae32019+67%2012
Rock WrenTroglodytidae32015+50%2004
MallardAnatidae22018+125%1992
Western Wood-PeweeTyrannidae22003+0%1988
Northern BobwhiteOdontophoridae22019+0%1991
American CootRallidae21991n/an/a
Red-tailed HawkAccipitridae22018+0%1995

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