BirdAnalyst
BBS Route · Wyoming · BCR 10

Gas Hills Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 35 species recorded across 4 survey years, no longer active.

35Species 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 →
4Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–2012Span
2Observers

Bird Species Found on Wyoming Gas Hills

Top 35 of 35 species by most recent count. Each links to its species trend.

Species recorded on the Gas Hills 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 LarkAlaudidae1192012-24%1992
Western MeadowlarkIcteridae342012+158%1992
Vesper SparrowPasserellidae312012+9%1992
Brewer's SparrowPasserellidae271993+29%1991
Lark BuntingPasserellidae142012-29%1992
Common RavenCorvidae122012+300%1991
Rock WrenTroglodytidae121993-37%1991
Clark's NutcrackerCorvidae71993-42%1991
Red-winged BlackbirdIcteridae72012+13%1992
Sage ThrasherMimidae72012-25%1992
American RobinTurdidae72012n/an/a
Loggerhead ShrikeLaniidae52012+400%1992
Grasshopper SparrowPasserellidae52012n/an/a
Green-winged TealAnatidae41993+33%1991
Mountain BluebirdTurdidae41993-43%1991
Ferruginous HawkAccipitridae31993-25%1991
Black-billed MagpieCorvidae32012+133%1992
KilldeerCharadriidae22012-62%1992
Mourning DoveColumbidae22012+375%1992
Red-tailed HawkAccipitridae21992+100%1991
Brewer's BlackbirdIcteridae22012-35%1992
Lark SparrowPasserellidae21992-83%1991
Swainson's HawkAccipitridae22012+100%1992
Golden EagleAccipitridae21992n/an/a
Common NighthawkCaprimulgidae21993+100%1992
Green-tailed TowheePasserellidae21993n/an/a
Spotted SandpiperScolopacidae11991n/an/a
Northern HarrierAccipitridae11992+0%1991
American KestrelFalconidae11993+0%1991
Yellow-headed BlackbirdIcteridae12012+0%1991
Cliff SwallowHirundinidae12012-80%1991
Rock PigeonColumbidae11992n/an/a
Say's PhoebeTyrannidae11993+0%1992
Black-capped ChickadeeParidae11993n/an/a
Sagebrush SparrowPasserellidae12012n/an/a

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