BirdAnalyst
BBS Route · Utah · BCR 9

Delta Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 82 species recorded across 28 survey years, still active.

82Species 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 →
28Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1987–2025Span
5Observers

Bird Species Found on Utah Delta

Top 40 of 82 species by most recent count. Each links to its species trend.

Species recorded on the Delta 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
House SparrowPasseridae1192025+33%1990
Horned LarkAlaudidae652025+29%1990
Red-winged BlackbirdIcteridae622025+232%1990
Franklin's GullLaridae432004+514%1997
Long-billed CurlewScolopacidae352021+486%1993
Song SparrowPasserellidae30200430×1990
American White PelicanPelecanidae302015n/an/a
Western KingbirdTyrannidae292025+100%1990
Mourning DoveColumbidae272025-52%1990
Western MeadowlarkIcteridae232025-62%1990
Common RavenCorvidae222025+310%1991
Snowy EgretArdeidae182005+135%1994
Barn SwallowHirundinidae172025-67%1990
Cliff SwallowHirundinidae112023-75%2000
White-faced IbisThreskiornithidae102010-90%1990
Eurasian Collared-DoveColumbidae102025+460%2010
Yellow-headed BlackbirdIcteridae82025-94%1990
Sagebrush SparrowPasserellidae72025-22%1995
Bullock's OrioleIcteridae62025+580%1992
Brewer's BlackbirdIcteridae62024-80%1990
Northern MockingbirdMimidae62025+64%1990
Northern Rough-winged SwallowHirundinidae62025+200%1995
Western Cattle-EgretArdeidae62005+100%1994
European StarlingSturnidae52025+294%1990
Brown-headed CowbirdIcteridae52025-87%1990
Red-tailed HawkAccipitridae42025+167%1997
House FinchFringillidae42025+333%2000
California QuailOdontophoridae42024+100%2017
Northern HarrierAccipitridae32025-22%1992
American RobinTurdidae32025+100%1993
Swainson's HawkAccipitridae32025+14%1992
Lark SparrowPasserellidae32025+56%1992
Sage ThrasherMimidae32025-40%1993
Savannah SparrowPasserellidae32025+20%1997
American WigeonAnatidae32005+50%2000
Ring-necked PheasantPhasianidae22025-94%1990
Rock PigeonColumbidae22024+75%1994
Black-throated SparrowPasserellidae22018-79%1990
Loggerhead ShrikeLaniidae22025-50%1990
Lark BuntingPasserellidae22005-67%1992

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