BirdAnalyst
BBS Route · Montana · BCR 10

Swan Lake Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 74 species recorded across 9 survey years, still active.

74Species 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 →
2015–2024Span
3Observers

Bird Species Found on Montana Swan Lake

Top 40 of 74 species by most recent count. Each links to its species trend.

Species recorded on the Swan Lake 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
Swainson's ThrushTurdidae792024-20%2017
Western TanagerCardinalidae252024-7%2017
Pine SiskinFringillidae142024-66%2017
Chipping SparrowPasserellidae122024-55%2017
Hammond's FlycatcherTyrannidae102024+10%2017
Yellow WarblerParulidae102019+267%2016
Townsend's WarblerParulidae102024+3%2017
Red-eyed VireoVireonidae102024-32%2019
Red CrossbillFringillidae92023+83%2018
MacGillivray's WarblerParulidae82024+0%2017
Red-breasted NuthatchSittidae82024-7%2017
Common RavenCorvidae72024+0%2017
Olive-sided FlycatcherTyrannidae62024+200%2018
Pacific WrenTroglodytidae62024+83%2017
White-breasted NuthatchSittidae62016+200%2015
American RobinTurdidae62024-54%2017
Red-naped SapsuckerPicidae52024-46%2017
Wilson's WarblerParulidae52021+0%2016
Ruby-crowned KingletRegulidae52024-62%2018
American RedstartParulidae52024-63%2018
Dusky FlycatcherTyrannidae52021n/an/a
Evening GrosbeakFringillidae42024-18%2017
Northern WaterthrushParulidae42024-47%2018
Pileated WoodpeckerPicidae32024+100%2016
Song SparrowPasserellidae32024-42%2017
Warbling VireoVireonidae32024+18%2017
Mountain ChickadeeParidae32024+78%2017
Canada GooseAnatidae32018n/an/a
Common MerganserAnatidae32023+0%2021
Boreal OwlStrigidae22015n/an/a
Williamson's SapsuckerPicidae22016-67%2015
Vaux's SwiftApodidae22024+100%2017
Least FlycatcherTyrannidae22015n/an/a
Tree SwallowHirundinidae22023+180%2016
Common YellowthroatParulidae22024-55%2017
Black-capped ChickadeeParidae22023-49%2017
Sandhill CraneGruidae22016n/an/a
Cedar WaxwingBombycillidae22024-62%2022
Orange-crowned WarblerParulidae22024-63%2019
Varied ThrushTurdidae22024+10%2019

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