BirdAnalyst
BBS Route · Idaho · BCR 9

Circular Bu Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 43 species recorded across 37 survey years, still active.

43Species 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 →
37Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1985–2024Span
15Observers

Bird Species Found on Idaho Circular Bu

Top 40 of 43 species by most recent count. Each links to its species trend.

Species recorded on the Circular Bu 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
Horned LarkAlaudidae277202418×1987
Western MeadowlarkIcteridae172024-52%1987
Sage ThrasherMimidae152024-49%1987
Common RavenCorvidae132024+900%1991
Yellow-headed BlackbirdIcteridae101989n/an/a
Brewer's SparrowPasserellidae92024-30%1987
Greater Sage-GrousePhasianidae82024+0%1988
Sagebrush SparrowPasserellidae72024-71%1987
Mourning DoveColumbidae62024-50%1987
American White PelicanPelecanidae62005n/an/a
Common NighthawkCaprimulgidae52024-34%1988
Rock PigeonColumbidae51998-17%1994
California GullLaridae52003n/an/a
Brown-headed CowbirdIcteridae32018-87%1987
Red-tailed HawkAccipitridae32024+0%2001
Lark SparrowPasserellidae32006+200%1998
Rock WrenTroglodytidae22022-33%1996
Ferruginous HawkAccipitridae22024-56%1989
European StarlingSturnidae22021+100%1997
Grasshopper SparrowPasserellidae22024-44%2005
Eastern KingbirdTyrannidae22007n/an/a
Gray FlycatcherTyrannidae22022n/an/a
Northern HarrierAccipitridae12024+100%1990
Short-eared OwlStrigidae12007-79%1990
Vesper SparrowPasserellidae12022-25%1989
Bank SwallowHirundinidae11985n/an/a
Loggerhead ShrikeLaniidae12024-33%1987
Franklin's GullLaridae1202326×2002
Swainson's HawkAccipitridae12021+0%1997
Burrowing OwlStrigidae12017+0%1989
Say's PhoebeTyrannidae11989n/an/a
Lark BuntingPasserellidae12015-74%1996
Brewer's BlackbirdIcteridae12014-91%1997
Chipping SparrowPasserellidae12023-43%2005
Common PoorwillCaprimulgidae12004+0%1995
WilletScolopacidae11996n/an/a
American KestrelFalconidae12019+0%1998
Western KingbirdTyrannidae12022+0%2004
Golden EagleAccipitridae12016-67%2007
Bald EagleAccipitridae12007n/an/a

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