BirdAnalyst
BBS Route · Utah · BCR 9

Callao Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 107 species recorded across 29 survey years, still active.

107Species 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 →
29Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2024Span
12Observers

Bird Species Found on Utah Callao

Top 40 of 107 species by most recent count. Each links to its species trend.

Species recorded on the Callao 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
Canada GooseAnatidae5152024+374%1994
Eared GrebePodicipedidae892024+79%1997
Western MeadowlarkIcteridae532024+639%1994
Red-winged BlackbirdIcteridae442024+34%1994
Savannah SparrowPasserellidae302024+6%1994
Green-winged TealAnatidae302010+800%2003
Yellow-headed BlackbirdIcteridae252024+435%1994
Black-throated SparrowPasserellidae232024+3%1994
Ring-billed GullLaridae232016+217%2000
Horned LarkAlaudidae212024-33%1994
Common YellowthroatParulidae202024+28%1996
Double-crested CormorantPhalacrocoracidae192016+44%2003
Snowy PloverCharadriidae172024+20%1996
American AvocetRecurvirostridae142024-67%1994
GadwallAnatidae102024-73%1994
Barn SwallowHirundinidae102024-83%1994
American White PelicanPelecanidae82024-29%2001
Cinnamon TealAnatidae62023-93%1994
CanvasbackAnatidae62022+6%1995
Marsh WrenTroglodytidae62024-42%1994
Wilson's PhalaropeScolopacidae52024-28%1995
Common RavenCorvidae52024+71%1994
Mourning DoveColumbidae52023+392%1997
Northern MockingbirdMimidae52024+100%1998
Mountain BluebirdTurdidae52011n/an/a
Common NighthawkCaprimulgidae42024+7%1994
Caspian TernLaridae42023-11%2005
House SparrowPasseridae42017+100%1995
Rock WrenTroglodytidae42024-18%1998
Blue-winged TealAnatidae42024-33%2003
OspreyPandionidae41999n/an/a
House FinchFringillidae42021+67%2015
Great-tailed GrackleIcteridae42016n/an/a
RedheadAnatidae32024-81%1995
WilletScolopacidae32019-33%1995
Western KingbirdTyrannidae32024+40%1994
MallardAnatidae32024-93%1995
Ring-necked PheasantPhasianidae32001+133%1995
Loggerhead ShrikeLaniidae32024-9%1999
Violet-green SwallowHirundinidae32012-63%2006

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