BirdAnalyst
BBS Route · Alaska · BCR 4

Delta Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 52 species recorded across 19 survey years, still active.

52Species Recorded
19Years Surveyed
1995–2024Span
3Observers

Bird Species Found on Alaska Delta

Top 40 of 52 species by most recent count. Each links to its species trend.

Species recorded on the Delta route.
History
Swainson's ThrushTurdidae1332024+64%1997
White-crowned SparrowPasserellidae1122024-31%1997
American RobinTurdidae472024+179%1997
Fox SparrowPasserellidae282024+157%1997
Orange-crowned WarblerParulidae192024-22%1997
White-winged CrossbillFringillidae182016-87%1997
Wilson's WarblerParulidae172024-52%1997
Lincoln's SparrowPasserellidae172024+10%2000
Canada JayCorvidae142024+50%1997
Savannah SparrowPasserellidae132024+0%1997
Alder FlycatcherTyrannidae112024-52%1997
Yellow WarblerParulidae82024+333%2004
MallardAnatidae82024-53%2019
Bank SwallowHirundinidae82024n/an/a
Boreal ChickadeeParidae62024-10%2001
Ring-necked DuckAnatidae62024n/an/a
Common RavenCorvidae52024+50%1998
Chipping SparrowPasserellidae42024+200%1998
Herring GullLaridae42024-73%2009
Violet-green SwallowHirundinidae42007n/an/a
BuffleheadAnatidae42024n/an/a
Varied ThrushTurdidae32024-24%1997
Ruby-crowned KingletRegulidae32024+14%2002
Hermit ThrushTurdidae32024+40%2002
Townsend's WarblerParulidae32024+100%2017
Olive-sided FlycatcherTyrannidae32024n/an/a
Pine SiskinFringillidae32024n/an/a
Short-billed GullLaridae22012+50%1998
Wilson's SnipeScolopacidae22019+33%2002
Bohemian WaxwingBombycillidae22024+25%1998
Blackpoll WarblerParulidae22024-50%2000
Great Horned OwlStrigidae22024+133%2003
Green-winged TealAnatidae22024+100%2019
Lesser YellowlegsScolopacidae12024-77%1997
Upland SandpiperScolopacidae12001+0%1996
Black-capped ChickadeeParidae12009-40%1998
Belted KingfisherAlcedinidae12013+0%1997
Sharp-tailed GrousePhasianidae11998n/an/a
Golden EagleAccipitridae11998n/an/a
Red-tailed HawkAccipitridae12007+0%2001

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