BirdAnalyst
BBS Route · Utah · BCR 9

Delta Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 82 species recorded across 27 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 →
27Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1987–2024Span
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 SparrowPasseridae6072024+62%1990
Horned LarkAlaudidae902024+7%1990
Franklin's GullLaridae432004+514%1997
European StarlingSturnidae362024+472%1990
Long-billed CurlewScolopacidae352021+486%1993
Song SparrowPasserellidae30200430×1990
American White PelicanPelecanidae302015n/an/a
Sagebrush SparrowPasserellidae282024+16%1995
Eurasian Collared-DoveColumbidae282024+640%2010
Mourning DoveColumbidae232024-57%1990
Red-winged BlackbirdIcteridae222024+123%1990
Barn SwallowHirundinidae222024-58%1990
Western KingbirdTyrannidae212024+83%1990
Western MeadowlarkIcteridae182024-59%1990
Snowy EgretArdeidae182005+135%1994
Brewer's SparrowPasserellidae132024+217%1990
Bullock's OrioleIcteridae122024+600%1992
Black-billed MagpieCorvidae112024-15%1990
Common RavenCorvidae112024+180%1991
Cliff SwallowHirundinidae112023-75%2000
House FinchFringillidae112023+367%2000
White-faced IbisThreskiornithidae102010-90%1990
Common NighthawkCaprimulgidae102024+93%1990
Brown-headed CowbirdIcteridae102024-89%1990
American RobinTurdidae82024+100%1993
KilldeerCharadriidae72024-74%1990
Sage ThrasherMimidae72024-50%1993
Northern Rough-winged SwallowHirundinidae72021+260%1995
MallardAnatidae62017+0%1990
Ring-necked PheasantPhasianidae62024-92%1990
Brewer's BlackbirdIcteridae62024-80%1990
Western Cattle-EgretArdeidae62005+100%1994
Savannah SparrowPasserellidae52024+20%1997
Northern MockingbirdMimidae42024+27%1990
Lark SparrowPasserellidae42023+44%1992
California QuailOdontophoridae42024+100%2017
Yellow-headed BlackbirdIcteridae32024-95%1990
Swainson's HawkAccipitridae32024+14%1992
American WigeonAnatidae32005+50%2000
Black-crowned Night HeronArdeidae22006+0%1991

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