BirdAnalyst
BBS Route · Idaho · BCR 9

Circular Bu Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 44 species recorded across 38 survey years, still active.

44Species 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 →
38Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1985–2025Span
16Observers

Bird Species Found on Idaho Circular Bu

Top 40 of 44 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 LarkAlaudidae264202514×1987
Western MeadowlarkIcteridae282025-58%1987
Brewer's SparrowPasserellidae152025-52%1987
Common RavenCorvidae122025+950%1991
Yellow-headed BlackbirdIcteridae101989n/an/a
Sagebrush SparrowPasserellidae92025-80%1987
Greater Sage-GrousePhasianidae82024+0%1988
Mourning DoveColumbidae62024-50%1987
American White PelicanPelecanidae62005n/an/a
Vesper SparrowPasserellidae52025+75%1989
Common NighthawkCaprimulgidae52024-34%1988
Rock PigeonColumbidae51998-17%1994
California GullLaridae52003n/an/a
Northern HarrierAccipitridae42025+167%1990
Brown-headed CowbirdIcteridae32018-87%1987
Red-tailed HawkAccipitridae32024+0%2001
Lark SparrowPasserellidae32006+200%1998
Loggerhead ShrikeLaniidae22025-56%1987
Rock WrenTroglodytidae22022-33%1996
European StarlingSturnidae22021+100%1997
Grasshopper SparrowPasserellidae22025-33%2005
Eastern KingbirdTyrannidae22007n/an/a
Gray FlycatcherTyrannidae22022n/an/a
Short-eared OwlStrigidae12007-79%1990
Bank SwallowHirundinidae11985n/an/a
Sage ThrasherMimidae12025-57%1987
Ferruginous HawkAccipitridae12025-56%1989
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
WilletScolopacidae12025+0%1996
American KestrelFalconidae12019+0%1998
Western KingbirdTyrannidae12022+0%2004
Golden EagleAccipitridae12016-67%2007
Bald EagleAccipitridae12007n/an/a

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