Subject
- Birds40
- Mammals33
- Biology--Fieldwork29
- Zoological surveys19
- Scientific expeditions16
- Bird populations12
- Voyages and travels12
- Animal diversity10
- Plants10
- Art9
- Biology9
- Botanical illustration9
- Botany9
- Fungi9
- Mushrooms9
- Mushrooms--Identification9
- Mushrooms--Research9
- Zoological specimens8
- Birds--Ecology7
- Animal populations6
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