Duh, its evolution. You make it sound like a war theatre.
(http://news.bbc.co.uk/1/hi/scotland/2920067.stm)
April 2005 - Animal rights activists are trying to rescue hedgehogs as an annual cull gets under way in the Outer Hebrides.
(http://news.bbc.co.uk/1/hi/scotland/4406675.stm)
October 2005 - Protest over annual hedgehog cull
(http://news.bbc.co.uk/1/hi/scotland/4390054.stm)
April 2007 - The board of Scottish Natural Heritage (SNH) has decided to suspend its cull of hedgehogs in the Western Isles.
(http://news.bbc.co.uk/1/hi/scotland/highlands_and_islands/63...)
February 2010 - Hebridean hedgehogs: a prickly issue The Uists cull has already cost more than £1m, but we should question the causal link between bird and hedgehog populations
(http://www.guardian.co.uk/commentisfree/2010/feb/25/hedgehog...)
February 2011 - £1.3m hedgehog cull to save islands' birds eggs 'fails'
(http://www.scotsman.com/news/163_1_3m_hedgehog_cull_to_save_...)
> invasive fish species all over the world
> introduced by humans for "sport"
Also, Florida has a lot of iguanas (which are non-native), especially in the Everglades, you just don't hear much about it because the pythons are a larger issue.