A recent study funded by the World Wide Fund for Nature (WWF) has concluded that the gradual warming of the Arctic due to global climate change is proving a serious threat to the survival of birds in the polar region. This was stated by the WWF in a recently released statement. The study claimed that the steadily rising temperatures would cause forested areas to advance northwards, replacing the current Tundra forest, which is host to a wealth of birds, some of which are unique. It estimated that the loss of 40-57 per cent of the Tundra by the years 2070-2099 would mean the destruction of a habitat currently supporting around 4-5 million geese and 7.5 waders. The study added that the very first effects of Arctic warming would probably be felt within a span of 10 years, and may well lead to the extinction of several species.