BirdAnalyst
BBS Route · Montana · BCR 10

Brunzell Slough Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 72 species recorded across 9 survey years, still active.

72Species 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 →
2015–2025Span
2Observers

Bird Species Found on Montana Brunzell Slough

Top 40 of 72 species by most recent count. Each links to its species trend.

Species recorded on the Brunzell Slough 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
Vesper SparrowPasserellidae382025+251%2018
Western MeadowlarkIcteridae292025+206%2018
Brewer's SparrowPasserellidae252025+216%2018
Sage ThrasherMimidae202025+20%2018
Common RavenCorvidae132025-35%2018
Red-winged BlackbirdIcteridae122025+191%2018
American RobinTurdidae112025+73%2018
Horned LarkAlaudidae82025+88%2018
European StarlingSturnidae82025+13%2019
Mountain BluebirdTurdidae72025-70%2018
Black-billed MagpieCorvidae62025+11%2018
House SparrowPasseridae62025-25%2018
Rock WrenTroglodytidae62025+100%2018
Mourning DoveColumbidae52025+16%2018
Northern House WrenTroglodytidae52025+163%2018
Rock PigeonColumbidae52025+400%2022
Eastern KingbirdTyrannidae42023+100%2015
Song SparrowPasserellidae42025-8%2018
American KestrelFalconidae42025+150%2021
White-crowned SparrowPasserellidae42025+233%2018
Long-billed CurlewScolopacidae42025+300%2023
Sandhill CraneGruidae32024+83%2019
Clark's NutcrackerCorvidae32025+100%2016
Brewer's BlackbirdIcteridae32025+13%2021
Yellow WarblerParulidae32025+0%2018
Bank SwallowHirundinidae32018n/an/a
Violet-green SwallowHirundinidae32025-31%2022
Short-eared OwlStrigidae32024n/an/a
Red-tailed HawkAccipitridae22025-56%2018
Willow FlycatcherTyrannidae22025-25%2021
Dusky FlycatcherTyrannidae22024+38%2018
American CrowCorvidae22025-58%2019
Brown-headed CowbirdIcteridae22025+100%2021
Northern HarrierAccipitridae22024+100%2016
Savannah SparrowPasserellidae22025+57%2019
Ferruginous HawkAccipitridae22024+150%2019
Green-tailed TowheePasserellidae22025+100%2021
Western TanagerCardinalidae22025+33%2022
Bald EagleAccipitridae22025-25%2023
Townsend's SolitaireTurdidae22022n/an/a

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