Climate risks

Birds embarking on long distance migrations are more vulnerable to shifts in the climate than ones making shorter journeys, a study suggests.

Scientists say the increasingly early arrival of spring at breeding sites in Europe makes it harder for the birds to attract a mate or find food.

The researchers warn that the "increasing ecological mismatch" can lead to a decline in bird populations.

The findings appear in the journal Proceedings B of the Royal Society.

"The study was based on a very large dataset of 117 migratory bird species that migrate from Africa or southern Europe to northern Europe, covering about 50 years," explained co-author Nicola Saino, from the University of Milan.