Goanna. Australia.
Goannas or monitor lizards are a common sight in Australia.
There are over 20 different species, adapted to different habitats, and interestingly they all look very similair.
But there is a big difference in their size. The largest Australian monitor lizard, the Perentie, can be over two metres long. Its tiny relative, the short-tailed monitor, reaches all of 20 cm. Original public domain image from Flickr