Apparently warming could mean that small species of Warbler (like whitethroat and blackcap) could have fly up to 250-300 miles further to reach breeding grounds.
Warming means that the birds will have to move further north, this could have a dramatic affect on the Whitethroat that already travel over 3000 miles.
One of the researchers Dr Stephen Willis of Durham University said:
Most warblers come here in spring and summer time to take advantage of the surplus of insects, and leave for warmer climes in the autumn.
From 2017 to 2100, nine out of the 17 species we looked at are projected to face longer migrations, particularly birds that cross the Sahara desert.
Our findings show that marathon migrations for some birds are set to become even longer journeys.
The distances migrants travel is amazing, especially when you realise that some of them only weigh 9 grams.
We can see the affects of warming in a microcosm in the UK. Warmer summers and cooler winters have see the Dartford Warbler extend its range north and the same is true of Cetti's Warbler.