Arthropoda: Phylogeny, bibliography, and links from the Tree of Life Project.
Brisbane Insects and Spiders: Photos and notes on insects and spiders in Brisbane, Australia.
Bug Pictures: Gallery of photos of insects and spiders, mainly from France.
BugGuide.Net: An online resource devoted to insects, spiders and their kin, with identification help, images, and information.
Bugs in Cyberspace: Images and information on many species of arthropods. Sections on phasmids, mantids, beetles, scorpions, and US invertebrates.
Canadian National Collection of Insects, Arachnids, and Nematodes: Information on the 16 million specimens contained in the collection, plus curatorial units and staff. Links to on-site entomology and arachnology documentation, and other relevant web sites.
Cirrus Digital Imaging: Gallery of close-up photos of common North American arthropods.
Common Insects of Texas: Gallery of 381 images of insects and other arthropods.
Herper.com: Invertebrates: Articles and links related to insects, arachnids, and other invertebrates.
Identification of Insects: An overview of morphological features of the different Classes of arthropods and Orders of insects, with photos of Italian arthropods by Alessandro Strano.
Insects and More: Image galleries of butterflies, odonates, other insects, and other arthropods from Texas.
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.
Introduction to the Arthropoda: The Arthropods, the largest animal phylum, includes insects, spiders, crustaceans, and others. Comprehensive information from UC-Berkeley website.
Introduction to the Cheliceramorpha: About the arthropod order that includes spiders and scorpions, mites and ticks, horseshoe crabs, and daddy-longlegs. Cheliceramorpha includes spiders and scorpions, mites and ticks, horseshoe crabs, daddy-longlegs, and extinct "sea-scorpions."
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.
Natural Perspective: Phylum Arthropoda (Joint-Legs)
Phylum Arthropoda: Philip Myers's introduction to Phylum Arthropoda, from the Animal Diversity Web.
Reference Library of Digitized Insect Sounds: Audio samples organized by both species and subject.
TIARA: Collaborative biological information system for the insects and terrestrial arthropods of the south-central United States and adjacent Mexico. Classification, range maps, taxon lists, images, Texas A and M University holdings, and links.
What's That Bug?: Information, user-contributed images, and identification help for insects and relatives of North America.