- Apples
- Aprecocks
- Archangel Blue Cat
- Arctotis Decurrens
- Arenicola piscatorium
- Argali (Ovis Poli)
- Argonaut
- Argus persicus. Capitulum of male
- Argynnis Aphrodite
- Arnee
- Arnee from Indian Painting
- Asellus aquaticus, Female
- Assala
- Auchmeromyia luteola
- Aurochs, or European Bison
- Australian Goshawk
- Avocet
- Avocet( Recurvirostra avocetta )
- Babirusa
- Bactrian Camel
- Balanoglossus clavigerus . (Young specimen, greatly enlarged)
- Bald Eagle
- Bald-headed Vulture
- Baltimore Oriole
- Baltimore Oriole and Nest
- Banteng
- barberries
- barberries
- Barfighting eagle
- Barn Swallow
- Barnacles
- Bastard Gemsbok (Antilope leucophaea, Pallas
- Bat
- Bathynomus giganteus
- Bathyteuthis abyssicola
- Beach crabs
- Beak of hemipteron
- bean plants
- Beans
- Bear
- Bear
- Bear
- Bear and Monkey
- Bear Cub
- Bear hunting
- Bear Text frame
- Bear with cubs
- Bear with two cubs
- Bearded vulture
- Bears are dangerous
- Bears descending from the Hills. (Prov. xxviii. 15)
- Beaver
- Beaver
- Beaver
- Beaver 2
- Bees
- Bees in Clover
- Bees on apple blossoms
- Beetle louse
- Beisa