A great tit with avian pox

A bird disease which can leave great tits riddled with lesions, stopping them feeding and leaving them vulnerable to predators, is spreading across the UK, researchers have warned. Members of the public are being asked to look out for garden birds that have signs of avian pox, a virus which could be transmitted through contaminated bird feeders as well as direct bird-to-bird contact and through biting insects.

This was one of 33 pictures of the day at the Telegraph.  Credit: Liz Cutting/Zoological Society of London/PA