Flora and Fauna
- 101
- Virus
- Comprehensive information from Wikipedia on these sub-microscopic infectious agents that are unable to grow or reproduce outside a host cell.
- 103
- Phylum Acanthocephala
- History, external features, internal features, reproduction, embryology, life cycle, ecology, phylogeny, and classification.
- 104
- The Phylum Acanthocephala
- An introduction to the biology, classification and ecology of spiny-headed worms.
- 105
- Annelida
- Information on these organisms and their phylogenetic relationships from the Tree of Life Web Project, with photographs of several species.
- 106
- The Phylum Annelida
- Provides information on this diverse phylum, the characteristics of worms, and information on the three classes, Polychaeta, Aelosomata and Clitellata.
- 112
- Bugs in Cyberspace
- Images and information on many species of arthropods. Sections on phasmids, mantids, beetles, scorpions, and US invertebrates.
- 114
- Graphic Science
- Image galleries of all major insect groups and other arthropods in Australia. Features the work of Australian macro insect photographer Denis Crawford.
- 115
- Insects of Ojibway Prairie, Windsor, Ontario
- Photo galleries and information on spiders, chiggers, mayflies, fireflies, dragonflies, butterflies, moths, leafhoppers and other invertebrates of urban areas, wetlands, prairies, and woodlands.
- 116
- Iowa State University Entomology Image Gallery
- A large collection of photographs and movies of insects and other arthropods and they damage they cause. Includes links to accompanying articles.
- 117
- Phylum Arthropoda
- Philip Myers's introduction to Phylum Arthropoda, from the Animal Diversity Web.