BirdAnalyst
BBS Route · Utah · BCR 9

Callao Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 109 species recorded across 30 survey years, still active.

109Species 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 →
30Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2025Span
12Observers

Bird Species Found on Utah Callao

Top 40 of 109 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 GooseAnatidae5492025+330%1994
GadwallAnatidae552025-35%1994
Red-winged BlackbirdIcteridae462025+36%1994
Western MeadowlarkIcteridae402025+606%1994
Black-throated SparrowPasserellidae342025+10%1994
Green-winged TealAnatidae302010+800%2003
Ring-billed GullLaridae232016+217%2000
Yellow-headed BlackbirdIcteridae212025+300%1994
Common YellowthroatParulidae202025+50%1996
Double-crested CormorantPhalacrocoracidae192016+44%2003
Savannah SparrowPasserellidae182025-7%1994
Horned LarkAlaudidae162025-33%1994
Eared GrebePodicipedidae132025+42%1997
Forster's TernLaridae112025+100%1994
American CootRallidae112025-70%1994
Common NighthawkCaprimulgidae92025+50%1994
Barn SwallowHirundinidae82025-84%1994
Marsh WrenTroglodytidae82025-29%1994
American AvocetRecurvirostridae72025-60%1994
Common RavenCorvidae72025+143%1994
Lark SparrowPasserellidae72025-42%1994
Wilson's PhalaropeScolopacidae52024-28%1995
Black-necked StiltRecurvirostridae52025-85%1994
Western KingbirdTyrannidae52025+100%1994
Mountain BluebirdTurdidae52011n/an/a
Cinnamon TealAnatidae42025-93%1994
Snowy PloverCharadriidae42025+30%1996
House SparrowPasseridae42017+100%1995
Northern MockingbirdMimidae42025+140%1998
Blue-winged TealAnatidae42024-33%2003
Bullock's OrioleIcteridae42025+133%2002
Great-tailed GrackleIcteridae42016n/an/a
American White PelicanPelecanidae32025-43%2001
RedheadAnatidae32024-81%1995
White-faced IbisThreskiornithidae32025-74%1994
Long-billed CurlewScolopacidae32025+0%1994
Brown-headed CowbirdIcteridae32025-46%1997
MallardAnatidae32024-93%1995
Ring-necked PheasantPhasianidae32001+133%1995
Mourning DoveColumbidae32025+258%1997

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