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BBS Route · Alaska · BCR 4

Seven Lakes Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 71 species recorded across 39 survey years, still active.

71Species 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 →
39Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1986–2025Span
7Observers

Bird Species Found on Alaska Seven Lakes

Top 40 of 71 species by most recent count. Each links to its species trend.

Species recorded on the Seven Lakes 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 ThrushTurdidae702025-22%1988
White-crowned SparrowPasserellidae422025-5%1988
American RobinTurdidae372025+248%1988
Alder FlycatcherTyrannidae362025+43%1988
Red CrossbillFringillidae202007-44%2003
Western Wood-PeweeTyrannidae172025+443%1990
Fox SparrowPasserellidae162025+200%1996
Hermit ThrushTurdidae142025+25%1989
Varied ThrushTurdidae142025+2%1988
Arctic TernLaridae92023+200%1994
Orange-crowned WarblerParulidae82025+33%1988
Wilson's SnipeScolopacidae62025+300%1989
Canada JayCorvidae62025-38%1988
Pine SiskinFringillidae62025+0%1995
Olive-sided FlycatcherTyrannidae52025+40%1988
Pine GrosbeakFringillidae52025+18%1991
Tree SwallowHirundinidae52025-31%1988
Townsend's WarblerParulidae52019+71%1990
Black-capped ChickadeeParidae52025-18%1994
Bank SwallowHirundinidae52007+400%1994
American Three-toed WoodpeckerPicidae52023+29%2012
Northern WaterthrushParulidae42025-70%1988
Ruby-crowned KingletRegulidae42025-74%1988
Short-billed GullLaridae42015+257%2005
Greater YellowlegsScolopacidae32025-57%1988
Yellow WarblerParulidae32025+80%1990
White-winged CrossbillFringillidae32025+69%1999
Black-backed WoodpeckerPicidae32017n/an/a
Common LoonGaviidae22025-67%1990
Savannah SparrowPasserellidae22025-67%1988
Boreal ChickadeeParidae22025+67%1990
Common RavenCorvidae22025-44%1990
Wilson's WarblerParulidae22024+0%1997
Red-necked GrebePodicipedidae22024-43%1993
Red-breasted MerganserAnatidae22019+25%1996
Pacific LoonGaviidae22010+0%2005
Common MerganserAnatidae22022+100%2000
Glaucous-winged GullLaridae12025-25%1989
Sandhill CraneGruidae12025+20%1991
American GoshawkAccipitridae12024+0%2010

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