- Category: Ecology lists
- Category: Nature-related lists
- Global 200, list of ecoregions to conserve, by the WWF
- Glossary of ecology
- Index of biology articles
- Index of conservation articles
- Index of environmental articles
- Introduced species in the British Isles
- IUCN Red List of extinct species
- List of clinically important bacteria
- List of conservation issues
- List of ecologists
- List of endangered species
- List of environmental issues
- List of environmental studies topics
- List of examples of convergent evolution
- List of introduced species
- List of life zones by region
- List of long-living organisms
- List of old growth forests
- List of organisms by chromosome count
- List of parasitic organisms
- List of symbiotic relationships
- List of unsolved problems in biology
- Lists of species
- Outline of biology
- Outline of ecology
- Timeline of environmental history
Animals
- Lists of animals
- List of animal sanctuaries
- List of animals by number of neurons
- Lists of aquarium fish
- List of aquarium fish by scientific name
- List of domesticated animals
- List of extinct animals
- List of extinct birds
- List of extinct mammals
- List of fish common names
- List of fish families
- List of freshwater aquarium fish species
- List of prehistoric bony fish
- List of prehistoric cartilaginous fish
- Outline of myrmecology (Scientific study of ants)
Plants
- APG III plant classification system (published in 2009)
- Category: Crops
- Category: Edible plants
- Category: Energy crops
- Glossary of plant morphology terms
- List of air-filtering plants
- List of Brazilian plants of Amazon Rainforest
- List of carnivorous plants
- List of companion plants (Companion planting)
- List of domesticated plants
- List of garden plants
- List of herbaria in Europe
- List of organic gardening and farming topics
- List of plant orders
- List of plants by common name
- List of poisonous plants
- List of repellent plants
- List of sustainable agriculture topics
- List of systems of plant taxonomy
- List of trifoliate plants
- List of wort plants
- PLANTS Database (USDA)
Ocean
Invasive species