Fears for fluffy mouse as threatened species list grows

The heath mouse has joined the growing number of threatened species on an international red list. (Supplied/AAP PHOTOS)

A fluffy native mouse is among the Australian animals added to the international red list of threatened species, with conservationists warning of an escalating global extinction crisis.

There are 742 endangered Australian plants and animals on the International Union for Conservation of Nature's Red List of threatened species, which grew by six species in the past year.