Cane toads in the Northern Territory
Cane toads - [Bufo marinus] - were introduced in Australia to help control a cane beetle. The toads soon became a far bigger problem than the beetle. They have spread far and wide in the warmer areas of Australia. Their skin contains poison glands that kill almost all potential predators here. Many species are at risk of extinction because of them. I found this one a willing subject where we were staying near a National Park. The only creatures who seem to have worked out a way to eat them are crows. I was told they turn them over leaving the poisoness skin uneaten.
Despite all this - I have to say - they are pretty amazing animals - God doesn't make junk.