- Dainty Sulphur
- Danaid Eggfly
- Dark Arches
- Dark Bush-cricket
- Dark Fishing Spider
- Dark Flower Scarab
- Dark Green Fritillary
- Dark Sailor Beetle
- Dark-banded Owlet
- Dark-barred Twin-spot Carpet
- Dark-eyed Junco
- Dark-spotted Palthis Moth
- Daurian Redstart
- Dead-nettle Leaf Beetle
- Decollate Snail
- DeKay's Brownsnake
- Delaware Skipper
- Delicate Cycnia Moth
- Desert Cottontail
- Devil's Coach Horse Beetle
- Diamondback Moth
- Diamondback Watersnake
- Dickcissel
- Dicyrtomina ornata
- Differential Grasshopper
- Dimorphic Jumping Spider
- Dingy Cutworm Moth
- Dingy Footman
- Dingy Skipper
- Ditch Jewel
- Dock Bug
- Dogbane Leaf Beetle
- Dollarbird
- Domestic Cat
- Domestic Dog
- Domestic Goat
- Domestic Horse
- Dorantes Longtail
- Dot-tailed Whiteface
- Dotted Paropsine Leaf Beetle
- Double-banded Grass-veneer
- Double-banded Scoliid Wasp
- Double-crested Cormorant
- Double-striped Bluet
- Double-striped Pug
- Douglas's Ground Squirrel
- Douglas's Squirrel
- Downy Emerald
- Downy Woodpecker
- Drab Brown Wave
- Dragonhunter
- Drinker Moth
- Dryad
- Dun Skipper
- Dun-bar
- Dungeness Crab
- Dunlin
- Dunnock
- Dusky Dancer
- Dusky Moorhen