In late May and early June millions of baby blue tits will be taking to the air for the first time. It's often a bit of a damp start to life with all the rain showers hitting the UK in springtime.
Incredibly only about one in ten will see their first birthday. As well as the threat of hunger and disease they're an easy target for predators like domestic cats and sparrowhawks. Many fall victim within the first few days of leaving the nest.
Blue tits have a large brood of chicks, so while these losses are unfortunate they rarely have any impact on the tit population from one year to the next.