Pictures of the day: 7 October 2013 There appeared to be a little sibling rivalry going on as two 12-week-old spotted quolls were introduced to the public at Chris Humfrey's Wild Action Zoo in Australia. Rather than posing for a nice family photo, the naughty duo seemed more eager to land a paw on one another. According to Chris, despite their small stature the carnivores, who are a lesser known cousin of the Tasmanian Devil, are aggressive by nature and are inclined to attack whatever crosses their path - even if that is a sibling. Quoll numbers in Australia had dwindled due to habitat destruction, poisoning and foxes and cats attacking their offspring and spreading diseases.Picture: Jay Town/Newspix/Rex