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BBS Route · Wyoming · BCR 10

Rock River Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 83 species recorded across 14 survey years, still active.

83Species 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 →
14Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1990–2022Span
5Observers

Bird Species Found on Wyoming Rock River

Top 40 of 83 species by most recent count. Each links to its species trend.

Species recorded on the Rock River 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
Canada GooseAnatidae4172022+630%1992
Franklin's GullLaridae129199865×1996
Horned LarkAlaudidae1032022-46%1992
GadwallAnatidae992022+921%1993
MallardAnatidae612022+10%1993
Thick-billed LongspurCalcariidae602022+77%1992
American White PelicanPelecanidae482022+55%1994
California GullLaridae402022+308%1992
RedheadAnatidae352022+344%1999
Barn SwallowHirundinidae352022+477%1996
Brewer's SparrowPasserellidae342022+258%1996
Western MeadowlarkIcteridae272022+133%1992
Vesper SparrowPasserellidae272022-43%1994
CanvasbackAnatidae212022+320%2016
American AvocetRecurvirostridae172022-66%1994
Cliff SwallowHirundinidae162022+0%1993
Red-winged BlackbirdIcteridae152022-4%1993
American CootRallidae152022-49%1998
Brown-headed CowbirdIcteridae122022+130%1994
WilletScolopacidae112022+0%1994
Eared GrebePodicipedidae112022+933%1998
Sage ThrasherMimidae102022+163%1999
Lesser ScaupAnatidae82022+35%1999
Double-crested CormorantPhalacrocoracidae71999-20%1993
Northern PintailAnatidae62022-69%1994
Common RavenCorvidae62022+160%2015
KilldeerCharadriidae52022-46%1993
Rock WrenTroglodytidae52022+0%1996
Yellow-headed BlackbirdIcteridae52017-78%1999
Clark's GrebePodicipedidae51999n/an/a
Lark SparrowPasserellidae42016+25%1993
Northern ShovelerAnatidae42006+19%1994
Spotted SandpiperScolopacidae41993n/an/a
Common NighthawkCaprimulgidae42022+18%2005
Clark's NutcrackerCorvidae42006+100%1998
Bank SwallowHirundinidae42022+143%2006
Green-tailed TowheePasserellidae42022+0%2006
Mourning DoveColumbidae32022+0%1998
Wilson's PhalaropeScolopacidae32016+35%1996
Red-tailed HawkAccipitridae32022+100%1996

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