At least one of Britain's birds appears to be coping well as climate change alters the availability of a key food.
Researchers found that great tits are laying eggs earlier in the spring than they used to, keeping step with the earlier emergence of caterpillars.
Writing in the journal Science, they point out that the same birds in the Netherlands have not managed to adjust. Understanding why some species in some places are affected more than others by climatic shifts is vital, they say.
The Royal Society for the Protection of Birds (RSPB) commented that other species are likely to fare much worse than great tits as temperatures rise.
The research uses a long record of great tits in a breeding site at Wytham Woods near Oxford, where observations began in 1947.