Earth Life
Wonderful World of Insects: An Introduction to the 32 Orders of Insects
A very thorough look at the world of insects. This site examines the 32 orders of insects and gives a complete explanation of the characteristics of each order. Text is supplemented with pictures.
Other
Biology of the Goat: External Parasites Lice
This effective site discusses biting lice, sucking lice, their life cycle, and treatment.