The distance sea turtles, whales and other wildlife might have to move to find more suitable sea temperatures can range from tens to thousands of kilometres.
North-west Europe, including the UK, is among the hotspots facing a rising risk of flooding, along with places such as India and the Bay of Bengal, and south east and east Asia.
First Red List for British Mammals - which meets international criteria used to assess threats to wildlife such as elephants and tigers - shows that 11 of our 47 native mammals are at risk of extinction.