BirdAnalyst
BBS Route · Wyoming · BCR 17

Glenrock Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 59 species recorded across 9 survey years, no longer active.

59Species 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 →
9Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–1977Span
1Observers

Bird Species Found on Wyoming Glenrock

Top 40 of 59 species by most recent count. Each links to its species trend.

Species recorded on the Glenrock 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
Western MeadowlarkIcteridae861977-11%1970
Horned LarkAlaudidae431977-24%1970
Vesper SparrowPasserellidae291977+300%1970
Cliff SwallowHirundinidae211977-9%1972
Brewer's BlackbirdIcteridae201977-65%1970
Lark BuntingPasserellidae181977-23%1970
Sage ThrasherMimidae171977+52%1972
Common NighthawkCaprimulgidae141977+63%1973
Brewer's SparrowPasserellidae131977-19%1972
Red-winged BlackbirdIcteridae121977+82%1970
Yellow WarblerParulidae121977-5%1970
European StarlingSturnidae111977-4%1970
Black-billed MagpieCorvidae91977-53%1970
Thick-billed LongspurCalcariidae91977+54%1973
Greater Sage-GrousePhasianidae71974n/an/a
American CootRallidae61968n/an/a
American RobinTurdidae61977-15%1970
KilldeerCharadriidae41977+19%1970
Mourning DoveColumbidae41977-23%1970
House SparrowPasseridae41977+14%1970
Golden EagleAccipitridae41976n/an/a
Eastern KingbirdTyrannidae31977+100%1972
Common GrackleIcteridae31977-30%1973
Lark SparrowPasserellidae31977-53%1972
Ferruginous HawkAccipitridae31973-57%1970
Green-winged TealAnatidae21974+100%1968
Brown ThrasherMimidae21973+100%1968
Blue-winged TealAnatidae21975-33%1969
Wilson's SnipeScolopacidae21977+100%1969
Spotted TowheePasserellidae21976-20%1973
Rock WrenTroglodytidae21977+0%1974
Common YellowthroatParulidae21976+0%1973
Loggerhead ShrikeLaniidae21977+100%1975
Green-tailed TowheePasserellidae21977n/an/a
MallardAnatidae11977-82%1972
Northern ShovelerAnatidae11968n/an/a
Ring-necked PheasantPhasianidae11974-50%1970
Northern HarrierAccipitridae11976-57%1972
Red-headed WoodpeckerPicidae11968n/an/a
Brown-headed CowbirdIcteridae11977-29%1972

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