- Brown Chick Thief
- Brown Creeper
- Brown Horse
- Brown horse and foal
- Brown Lemming
- Brown Rat
- Brown Tabby with the black bars far too wide
- Brown Thrasher
- Brown-headed Cowbird
- Bucked off
- Bucking Horse
- Buffalo grazing
- Bull Buffalo in National Museum Group
- Bull calf and the poppy
- Bull calf chasing an old lady
- bunch of the long-winged seeds of the ash
- Burdock
- Burdock Burr
- Butter fish
- Butterfly
- Butterfly and flower frame
- Butterfly frame
- Buzzard
- Calf
- Calf
- Calf and caravan
- Callianassa stebbingi (Female), a Sand-burrowing Thalassinid from the South Coast of England
- Calliphora erythrocephala
- Calocalanus pavo, One of the Free-swimming Copepoda of the Plankton
- Camel
- Canada Geese
- Canada Goose
- Canada Goose
- Cape Buffalo
- Cape Buffalo
- Cardinal
- Caribou
- Carolina duck
- Carolina Wren
- Cartoon Cat
- Casuarius uniappendiculatus
- Cat
- Cat
- Cat
- Cat and dogs standoff
- Cat and five kittens
- Cat and kitten
- Cat and Kitten
- Cat and kitten 2
- Cat and kitten 3
- Cat and Kittens
- Cat and mouse
- Cat and Shadow
- Cat and three kittens
- Cat asleep on a chair
- Cat at Show
- Cat cleaning itself
- Cat cleaning itself
- Cat climbing into basket
- Cat Eating