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Subject
- Birds693
- Game and game-birds109
- Hunting74
- Identification40
- Oiseaux40
- Audubon, John James, 1785-185127
- Conservation23
- Ornithology23
- Bird watching21
- Shore birds21
- Behavior19
- Ornithologists19
- Water birds18
- Birds of America17
- Eggs17
- Waterfowl16
- Birds of prey14
- Collection and preservation14
- Eggs and nests13
- Geographical distribution13