A recent visit to Whipsnade Zoo offered an opportunity to see exotic creatures not usually spotted in the UK. But amidst the elephants, tigers and giraffes, smaller less assuming animals roam free in their 600 acres. One of these is the Mara, which at first glance looks like a big rabbit. Or a very small deer. It's actually the fourth largest rodent in the world and quite interesting to read up on courtesy of Wikipedia or Whipsnade's own page.
It looks especially rabbity when sat as above, though when stood up you can see the long legs and hoof-life feet at the back. As far as I can tell these haven't escaped into the wild and become established, though they're clearly happy enough roaming the Dunstable Downs fairly freely, but within the confines of the zoo.