Some spiders have amazing powers of dispersal. Large spiders may crawl only a few metres per day, but small ones balloon through the air 50 km or more per day.
All spiders are poisonous to some degree, even those few species that have poison glands partly modified into glue-spitting glands. Venom is injected into the prey to either immobilize or kill it. Black widow spiders, which are among the most poisonous of animals, are found in southern Ontario, Saskatchewan, Alberta and BC. Their venom is about 200 times as poisonous as that of a RATTLESNAKE per unit volume.
Relationship to Humans
Author ROBIN LEECH
J.A. Coddington and H.W. Levi, "Systematics and Evolution of Spiders (Araneae)," Annual Review of Ecology and Systematics, vol 22 (1991); Rainer F. Foelix, Biology of Spiders, 2nd ed (1996); B.J. Kaston, How To Know the Spiders, 3rd ed (1978); D. Ubick, P. Paquin, P.E. Cushing and V. Roth, Spiders of North America: An Identification Manual (2005).
Links to Other Sites
Canadian Biodiversity Website
A great information source for all budding biologists. Learn about biodiversity theory, natural history, and conservation issues. From McGill’s Redpath Museum.
The Canadian National Collection of Insects, Arachnids and Nematodes
This website provides information about the scope and contents of the Canadian National Collection of Insects, Arachnids and Nematodes. Check the “Index” link for illustrated descriptions of various taxonomic groups.
Researchers identify giant new spider species
A news article about Nephila komaci, a saucer-sized spider species found in South Africa. From thestar.com.
Canadian Spider Diversity and Systematics
A detailed article about Canadian spider diversity and systematics from the "E-Fauna" website.
Aquatic Invertebrates of Alberta Online Textbook
An online guide to all major groups of Alberta's aquatic invertebrates. Offers illustrated details of the natural history of each group as well as tips on collecting and preserving specimens. A University of Alberta website.
Shawnadithit grew anxious waiting for her uncle, Longnon, to return to camp at the junction of Badger Brook and the Exploits River, deep in the wilds of Newfoundland...