The Daily Telegraph has a great story about the steady southern migration of the Cane Toad, an introduced and highly destructive creature that is now turning up all over Sydney - a long way from where it was first introduced in the cane fields of Queensland (via Hawaii).
The story is based on the collection of a single specimen - a chihuahua-sized toad found in a Quakers Hill backyard - but CFZ Australia has reported on the invasion of the city by the tenacious toad before.
