Oh my gosh, loooook... antechinus! (A tiny rodent-like marsupial!) SO CUTE. I have never ever (not even in photos!) seen one with facial markings/colour morphing like this! That distinct V shape/inverted heart shape pattern on its face!
Did you know that male antechinus, as well as the males of most other species belonging to the family dasyuridae (insectivorous and carnivorous marsupials, they got teeeeth!!!) die after mating? They go into an intense mating frenzy lasting about two weeks, eating and drinking nothing, then die of exhaustion. (Technically the elevated testosterone will kill them in captivity, even if they're not exhausted)