Some insects wear gory disguises and macabre masks year round, not just at Halloween.
For the first time, researchers have estimated the toll taken by feral and pet cats on Australia's bird life - and the numbers are high enough to push several species towards extinction.
Australia was a different place 275 million years ago - wild storms surged through icy seas, and marine animals lived a tenuous existence. But brittle stars had a survival strategy.
Being blue is risky for superb fairy-wrens: males become more cautious when their plumage turns blue, and other wrens take advantage by using them as colourful decoys.
Sound wildlife management is incredibly important, and could enhance the conservation status of large carnivores like the leopard, which has recently been listed as a vulnerable species.
Predators aren't living the easy life – most hunts are unsuccessful.
Notorious for their gruesome cannibalism, praying mantises have a hidden talent. Controlling the spin on their jumps allows juveniles to make precision landings, before their wings have developed.