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Birds
19
Alaska
18
Yukon Delta
17
Animals/Vertebrates
16
Biological Classification
16
Ducks/Geese/Swans
14
Yukon Delta National Wildlife Refuge
14
biota
14
Ecological Dynamics
12
Somateria
12
Species Life History
12
Biosphere
10
Environmental Conditions
10
Lead
10
Metapopulations
10
Population Dynamics
10
Somateria fischeri
10
Species/Population Interactions
10
Spectacled Eider
10
Kashunuk River
8
Clangula
7
Colville River Delta
6
Biota
5
Earth Science
5
Anser
4
Aythya
4
Aythya marila
4
Clangula hyemalis
4
Gavia
4
Indigirka River
4
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Alaska
19
Kuskokwim
Yukon
19
Arctic
4
Aythya marila
4
Branta bernicla
3
Cygnus columbianus
3
Somateria mollissima
3
Anas acuta
2
Anas clypeata
2
Bering Land Bridge
2
Calidris alpina
2
Kamchatka
2
Kamchatka Peninsula
2
Larus canus
2
Melanitta fusca
2
Melanitta nigra
2
Nunavut
2
Phalaropus lobatus
2
Polysticta stelleri
2
Prudhoe Bay
2
Queen Maud Gulf
2
Seward Peninsula
2
Somateria spectabilis
2
Sterna paradisaea
2
Xema sabini
2
Common Eider
1
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