Chick Mortality Highest for Older Great Tits

Great tit by chapmankj75, on Flickr
Great tit by chapmankj75, on Flickr

A new study from Oxfordshire, has shown that Great Tit breeding success is best in younger females.

Chick mortality is highest for older females, which is thought to be linked to the parents diminishing ability to guide their new offspring for the first few weeks after fledging.

The study also showed that those birds investing heavily in breeding during the first few years of their breeding lives have the most descendants.

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