BirdAnalyst
BBS Route · Wyoming · BCR 10

Black Rock 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 25 species recorded across 7 survey years, still active.

25Species 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 →
7Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2010–2025Span
3Observers

Bird Species Found on Wyoming Black Rock 2

Top 25 of 25 species by most recent count. Each links to its species trend.

Species recorded on the Black Rock 2 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 LarkAlaudidae1372025+85%2012
Brewer's SparrowPasserellidae472025+237%2012
Sage ThrasherMimidae302025+25%2012
Sagebrush SparrowPasserellidae212025-40%2012
Mourning DoveColumbidae12202511×2012
Common RavenCorvidae42025+100%2012
Burrowing OwlStrigidae32010n/an/a
Brown-headed CowbirdIcteridae32024+200%2019
Common PoorwillCaprimulgidae32023n/an/a
American AvocetRecurvirostridae22023+100%2010
KilldeerCharadriidae22025+50%2019
Loggerhead ShrikeLaniidae22025+50%2019
Common NighthawkCaprimulgidae22025+160%2023
Green-tailed TowheePasserellidae22025+0%2019
Ferruginous HawkAccipitridae22024+50%2019
Northern PintailAnatidae22024n/an/a
Greater Sage-GrousePhasianidae12025-65%2012
American KestrelFalconidae12010n/an/a
Vesper SparrowPasserellidae12010n/an/a
Northern HarrierAccipitridae12019+0%2011
Prairie FalconFalconidae12025+0%2011
Red-winged BlackbirdIcteridae12023+0%2012
Western MeadowlarkIcteridae12023+0%2012
MallardAnatidae12023n/an/a
Rock WrenTroglodytidae12025n/an/a

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