Encyclopedias, Almanacs, Transcripts, and Maps
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- IUCN—The World Conservation Union
- Iupiter Dolichenus
- IVF
- Ivory-Billed Woodpecker
- Izaak Walton League
- J?do Shinsh?
- J?dosh?
- J?vanmukti
- Ja?far al-??diq
- jabiru
- Jacamars (Galbulidae)
- Jacanas (Jacanidae)
- jack rabbit
- Jackson, Wes (1936 – ) American Environmentalist and Writer
- Jade, August Personage of
- Jaguars
- Jam??at-I Isl?m?
- James Bay Hydropower Project
- James Edward Francis Stuart