BirdAnalyst
BBS Route · Wyoming · BCR 10

Bairoil Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 67 species recorded across 30 survey years, still active.

67Species 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 →
1988–2025Span
3Observers

Bird Species Found on Wyoming Bairoil

Top 40 of 67 species by most recent count. Each links to its species trend.

Species recorded on the Bairoil 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 LarkAlaudidae1232025+65%1991
Vesper SparrowPasserellidae682025+189%1991
Brewer's SparrowPasserellidae622025+133%1991
Sage ThrasherMimidae492025+73%1991
Western MeadowlarkIcteridae122025+490%1991
Cliff SwallowHirundinidae122011+200%1991
Sagebrush SparrowPasserellidae92025-66%1995
American CrowCorvidae72024+150%1994
Greater Sage-GrousePhasianidae62025-14%1991
Brewer's BlackbirdIcteridae62025+217%1992
Yellow WarblerParulidae62025+88%1994
Green-tailed TowheePasserellidae62025+200%1995
Red-winged BlackbirdIcteridae52025+150%1992
American RobinTurdidae52024-27%1995
Black-billed MagpieCorvidae42025-30%1992
Savannah SparrowPasserellidae42025+80%1994
Violet-green SwallowHirundinidae42023+0%1993
Lark BuntingPasserellidae32025-72%1991
Clark's NutcrackerCorvidae32025+100%1992
Common RavenCorvidae32025+67%1996
Song SparrowPasserellidae32025n/an/a
KilldeerCharadriidae22024+57%1991
Mountain PloverCharadriidae21988n/an/a
Grasshopper SparrowPasserellidae22024+67%1991
Rock WrenTroglodytidae22025+33%1992
Mourning DoveColumbidae22025+386%1993
Barn SwallowHirundinidae22024+33%1996
GadwallAnatidae22014+50%2006
Loggerhead ShrikeLaniidae22025+25%1999
MallardAnatidae22024+67%1997
Wilson's SnipeScolopacidae22025-50%1997
American GoldfinchFringillidae22025-67%2006
Sandhill CraneGruidae22007n/an/a
Common NighthawkCaprimulgidae22025+67%2011
Canada GooseAnatidae22024-50%2023
Northern HarrierAccipitridae12025-20%1991
Ferruginous HawkAccipitridae12022-43%1991
Bewick's WrenTroglodytidae11990n/an/a
Golden EagleAccipitridae12025+33%1995
Willow FlycatcherTyrannidae12023+0%1991

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