BirdAnalyst
BBS Route · Montana · BCR 10

Swan Lake Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 74 species recorded across 10 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 →
10Years 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
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 ThrushTurdidae902025+2%2017
Pine SiskinFringillidae302025-50%2017
Western TanagerCardinalidae172025-8%2017
Red-breasted NuthatchSittidae132025-17%2017
Red-eyed VireoVireonidae132025-38%2019
Hammond's FlycatcherTyrannidae102025+14%2017
Chipping SparrowPasserellidae102025-63%2017
Yellow WarblerParulidae102019+267%2016
American RobinTurdidae102025-60%2017
Red CrossbillFringillidae102025+217%2018
Common RavenCorvidae82025-11%2017
MacGillivray's WarblerParulidae62025+10%2017
White-breasted NuthatchSittidae62016+200%2015
Wilson's WarblerParulidae52021+0%2016
Pacific WrenTroglodytidae52025+25%2017
Golden-crowned KingletRegulidae52025+71%2017
Ruby-crowned KingletRegulidae52025-82%2018
Dusky FlycatcherTyrannidae52021n/an/a
Evening GrosbeakFringillidae42024-18%2017
Townsend's WarblerParulidae42025-45%2017
Common YellowthroatParulidae42025-50%2017
Black-capped ChickadeeParidae42025-69%2017
Song SparrowPasserellidae32025-25%2017
Warbling VireoVireonidae32024+18%2017
Canada GooseAnatidae32018n/an/a
Common MerganserAnatidae32023+0%2021
Boreal OwlStrigidae22015n/an/a
Williamson's SapsuckerPicidae22016-67%2015
Pileated WoodpeckerPicidae22025+100%2017
Vaux's SwiftApodidae22024+100%2017
Olive-sided FlycatcherTyrannidae22025+200%2018
Least FlycatcherTyrannidae22015n/an/a
Tree SwallowHirundinidae22023+180%2016
Mountain ChickadeeParidae22025+33%2017
Sandhill CraneGruidae22016n/an/a
Calliope HummingbirdTrochilidae22025+33%2022
Cedar WaxwingBombycillidae22024-62%2022
American RedstartParulidae22025-74%2018
Orange-crowned WarblerParulidae22024-63%2019
Northern WaterthrushParulidae22025-60%2018

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