Endangered - Musky Rat Kangaroo - It is the smallest kangaroo in the world, lives on the jungle floor, and is one of the few daytime marsupials in existence. It moves more like a rabbit than like a kangaroo. It has become endangered because of new golf courses and houses being built in place of the forest it once lived in.
Invasive - Tramp ants - Tramp ants are among the world’s worst most dangerous invasive species, attacking, blinding, and killing vertebrates and invertebrates, and electric ants have contributed to the decline of many native species in places like Hawaii, the Galapagos and New Caledonia. On Australia’s Christmas Island they have lead to severe disruption of ecosystem services. There are concerns that the ground-nesting habits of cassowaries may make them particularly vulnerable to attacks by electric ants.