- Adélie penguin -- Antarctica1
- Adélie penguin -- Climatic factors -- Antarctica1
- Adélie penguin -- Food -- Antarctica1
- Agriculture -- Environmental aspects -- Oregon -- Umatilla River1
- Albatrosses1
- Ammodytes -- Massachusetts -- Stellwagen Bank National Marine Sanctuary -- Geographical distribution1
- Ammodytes -- Predators of -- Ecology -- Massachusetts -- Stellwagen Bank National Marine Sanctuary1
- Anabantidae -- South Africa -- Genetics1
- Anabantidae -- South Africa -- Phylogeny1
- Anabantidae -- Variation -- South Africa1
- Araliaceae -- Seeds -- Dispersal -- Alaska, Southwest1
- Bighorn sheep -- Climatic factors -- Southwest, New1
- Bighorn sheep -- Conservation -- Southwest, New1
- Bighorn sheep -- Genetics -- Southwest, New1
- Bighorn sheep -- Habitat -- Southwest, New1
- Bird communities -- Oregon, Eastern1
- Bird declines -- Oregon, Eastern1
- Birds -- Habitat -- Oregon, Eastern1
- Birds -- Oregon, Eastern1
- Black bear -- Food -- Alaska, Southwest1