BirdAnalyst
BBS Route · Montana · BCR 10

Brunzell Slough Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 69 species recorded across 8 survey years, still active.

69Species 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 →
8Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2015–2024Span
2Observers

Bird Species Found on Montana Brunzell Slough

Top 40 of 69 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 SparrowPasserellidae572024+288%2018
Western MeadowlarkIcteridae382024+212%2018
Brewer's SparrowPasserellidae342024+177%2018
Horned LarkAlaudidae222024+146%2018
European StarlingSturnidae172024+13%2019
Sage ThrasherMimidae172024+22%2018
Rock WrenTroglodytidae152024+80%2018
Black-billed MagpieCorvidae142024+7%2018
American RobinTurdidae122024+73%2018
Mourning DoveColumbidae112024+16%2018
Northern House WrenTroglodytidae102024+163%2018
Red-winged BlackbirdIcteridae92024+155%2018
Yellow WarblerParulidae82024+0%2018
Long-billed CurlewScolopacidae72024+600%2023
House SparrowPasseridae62024-35%2018
White-crowned SparrowPasserellidae62024+233%2018
Violet-green SwallowHirundinidae62024-23%2022
Rock PigeonColumbidae62023+500%2022
Song SparrowPasserellidae52024-8%2018
KilldeerCharadriidae42024+50%2018
Eastern KingbirdTyrannidae42023+100%2015
Tree SwallowHirundinidae42024+13%2018
Mountain BluebirdTurdidae42024-72%2018
Savannah SparrowPasserellidae42024+43%2019
Lazuli BuntingCardinalidae42018n/an/a
Sandhill CraneGruidae32024+83%2019
Wilson's SnipeScolopacidae32024+17%2018
Brewer's BlackbirdIcteridae32024+38%2021
Bank SwallowHirundinidae32018n/an/a
Short-eared OwlStrigidae32024n/an/a
Dusky FlycatcherTyrannidae22024+38%2018
Common RavenCorvidae22024-35%2018
American CrowCorvidae22023-58%2019
Brown-headed CowbirdIcteridae22024+100%2021
Common YellowthroatParulidae22019+0%2015
Northern HarrierAccipitridae22024+100%2016
Ferruginous HawkAccipitridae22024+150%2019
Western TanagerCardinalidae22023+100%2021
Townsend's SolitaireTurdidae22022n/an/a
Pine SiskinFringillidae22024n/an/a

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