burrows

We think of spiders as fearsome hunters, spinners of webs and treacherous mates, but construction workers? Yes, that too. Some groups of spiders - trapdoor and wolf spiders - dig tunnels that they use to ambush passing insects. But these tunnels can also provide shelter and accommodation for other animals, including one of the rarest of Australia's lizards - the pygmy blue-tongue lizard. It seems that the lizard's survival depends entirely on the spiders. The pygmy blue-tongue is a native of South Australia. It's so rare that zoologists thought it extinct for over 30 years and it re-emerged…