BBS Route · Alaska · BCR 1
Adak Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 41 species recorded across 14 survey years, no longer active.
1983–2001Span
9Observers
Bird Species Found on Alaska Adak
Top 40 of 41 species by most recent count. Each links to its species trend.
| 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 | |||
|---|---|---|---|---|---|---|
| Marbled Murrelet | Alcidae | 119 | 1997 | +292% | 1986 | |
| Lapland Longspur | Calcariidae | 90 | 2001 | -21% | 1985 | |
| Red-breasted Merganser | Anatidae | 44 | 2001 | +324% | 1985 | |
| Greater Scaup | Anatidae | 31 | 2001 | +52% | 1985 | |
| Rock Ptarmigan | Phasianidae | 18 | 2001 | -2% | 1985 | |
| Harlequin Duck | Anatidae | 16 | 2001 | -57% | 1985 | |
| Arctic Tern | Laridae | 14 | 1997 | -15% | 1986 | |
| Glaucous-winged Gull | Laridae | 13 | 2001 | +24% | 1985 | |
| Ancient Murrelet | Alcidae | 11 | 1997 | -12% | 1992 | |
| Green-winged Teal | Anatidae | 11 | 2001 | -24% | 1985 | |
| Black-legged Kittiwake | Laridae | 9 | 1992 | +536% | 1985 | |
| Aleutian Tern | Laridae | 7 | 2001 | -29% | 1985 | |
| Common Raven | Corvidae | 7 | 2001 | +42% | 1985 | |
| Bald Eagle | Accipitridae | 6 | 2001 | -68% | 1985 | |
| Eurasian Wigeon | Anatidae | 6 | 1995 | n/a | n/a | |
| Tufted Puffin | Alcidae | 4 | 1995 | -74% | 1986 | |
| Northern Pintail | Anatidae | 4 | 1997 | -40% | 1986 | |
| Snow Bunting | Calcariidae | 4 | 2001 | -22% | 1986 | |
| Black Oystercatcher | Haematopodidae | 3 | 1995 | +33% | 1986 | |
| Horned Puffin | Alcidae | 2 | 1987 | +333% | 1984 | |
| Pigeon Guillemot | Alcidae | 2 | 2001 | -22% | 1991 | |
| Parasitic Jaeger | Stercorariidae | 2 | 2001 | -73% | 1985 | |
| Purple Sandpiper | Scolopacidae | 2 | 1983 | n/a | n/a | |
| Gray-crowned Rosy-Finch | Fringillidae | 2 | 2001 | -22% | 1985 | |
| Mallard | Anatidae | 2 | 2001 | -26% | 1986 | |
| Pacific Wren | Troglodytidae | 2 | 1997 | +100% | 1987 | |
| Rock Sandpiper | Scolopacidae | 2 | 2001 | +44% | 1991 | |
| Kittlitz's Murrelet | Alcidae | 2 | 2001 | -50% | 1987 | |
| Pelagic Cormorant | Phalacrocoracidae | 1 | 2001 | +90% | 1985 | |
| Red-necked Phalarope | Scolopacidae | 1 | 2001 | -33% | 1985 | |
| Song Sparrow | Passerellidae | 1 | 2001 | -39% | 1985 | |
| Common Tern | Laridae | 1 | 1986 | n/a | n/a | |
| Black-headed Gull | Laridae | 1 | 1992 | +0% | 1987 | |
| Savannah Sparrow | Passerellidae | 1 | 1990 | n/a | n/a | |
| Semipalmated Plover | Charadriidae | 1 | 1995 | +0% | 1991 | |
| Common Loon | Gaviidae | 1 | 2001 | -33% | 1993 | |
| Northern Shoveler | Anatidae | 1 | 1992 | n/a | n/a | |
| Sandhill Crane | Gruidae | 1 | 1993 | n/a | n/a | |
| Bufflehead | Anatidae | 1 | 1997 | +0% | 1994 | |
| American Wigeon | Anatidae | 1 | 1995 | n/a | n/a |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.