BirdAnalyst
BBS Route · Alaska · BCR 4

Seven Lakes Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 69 species recorded across 37 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 →
37Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1986–2023Span
6Observers

Bird Species Found on Alaska Seven Lakes

Top 40 of 69 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 ThrushTurdidae462023-14%1988
Varied ThrushTurdidae282023+74%1988
White-crowned SparrowPasserellidae222023-36%1988
American RobinTurdidae222023+352%1988
Red CrossbillFringillidae202007-44%2003
Alder FlycatcherTyrannidae112023-21%1988
Wilson's SnipeScolopacidae102023+400%1989
Arctic TernLaridae92023+200%1994
Olive-sided FlycatcherTyrannidae82023+100%1988
Orange-crowned WarblerParulidae82023+53%1988
Western Wood-PeweeTyrannidae72023+443%1990
Hermit ThrushTurdidae62023-5%1989
Greater ScaupAnatidae61994+500%1990
Pine GrosbeakFringillidae52023-27%1991
Townsend's WarblerParulidae52019+71%1990
Golden-crowned SparrowPasserellidae52023+83%1997
Bank SwallowHirundinidae52007+400%1994
American Three-toed WoodpeckerPicidae52023+29%2012
Canada JayCorvidae42023-33%1988
Ruby-crowned KingletRegulidae42023-63%1988
Herring GullLaridae42023+33%2002
Short-billed GullLaridae42015+257%2005
Trumpeter SwanAnatidae42012n/an/a
Sandhill CraneGruidae32023+20%1991
Yellow WarblerParulidae32022+100%1990
Fox SparrowPasserellidae32023+50%1996
Black-backed WoodpeckerPicidae32017n/an/a
Greater YellowlegsScolopacidae22022-64%1988
Tree SwallowHirundinidae22022-39%1988
Boreal ChickadeeParidae22023+133%1990
Violet-green SwallowHirundinidae22022-13%2004
Black-billed MagpieCorvidae22023+0%1995
Black-capped ChickadeeParidae22023-9%1994
Red-breasted MerganserAnatidae22019+25%1996
Pacific LoonGaviidae22010+0%2005
Lincoln's SparrowPasserellidae22023-38%2002
Common MerganserAnatidae22022+100%2000
Common LoonGaviidae12023-42%1990
Glaucous-winged GullLaridae12018-25%1989
American GoshawkAccipitridae12012+0%2008

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