Encyclopedias, Almanacs, Transcripts, and Maps
- Dubos, René Jules (1901 – 1982) French/American Microbiologist, Ecologist, and Writer
- duck-billed platypus
- Duck-Billed Platypus (Ornithorhynchidae)
- Ducks Unlimited
- Ducks, Geese, and Swans (Anatidae)
- Ducktown, Tennessee
- Dugongs and Sea Cows (Dugongidae)
- Dumèzil, Georges
- Dumuzi
- Dunes and Dune Erosion
- Durgā Hinduism
- Dushun
- Duṭṭhagāmaṇ
- Duvalier, ‘Baby Doc’
- Duvalier, ‘Papa Doc’
- Dvergar
- Dwarf Lemurs and Mouse Lemurs (Cheirogaleidae)
- Dwight, Timothy
- Dyfed-Powys
- Dying and Rising Gods