Little Egret
The little egret is a small, white heron that feeds on small fish and crustaceans. Once a very rare visitor from the Mediterranean, little egrets are now a common sight around the coasts of southern England and Wales as they expand their range, possibly due to increasing temperatures caused by climate change. It first bred in the UK on Brownsea Island, Dorset, in 1996, and has been moving northwards ever since; it was recorded as breeding in Berkshire for the first time in 2007.