Nature's Exotic Athletes - Strange Animal Sports

ARKive - Images of Life on Earth (Noah's Ark for the internet - includes videos, images and fact files)

The Gould Group.
Three Victorian Zoo's site.
International Union of Conservation of Nature
Ready Education Kid's World
Department of Sustainability and Environment (Australia).

Invasive Species - Australia's Feral Future
Best place to find free-to-use pictures is on Flickr ( Make sure you go to Advanced Search and check "Creative Commons"
Find images in the "Rogue's Gallery" -
Feral animals in Australia for Kids
Feral Feast - Library Think Quest
Pest management from the CSIRO -
Australian government site (general information)
Invasive species in Australia (Wikipedia)