A widespread and well known bird it is our commonest tit.It is a very acrobatic and agile bird that is constantly on the lookout for a diet of insects, especially caterpillars, and seeds. In springtime they feed also on pollen, nectar and sap, and in the autumn on berries. In winter they will also readily yake seed, peanuts and suet from the bird table. Blue Tits will nest in any hole in a tree, wall or nest box. For such a small bird their clutch size is very large, laying 10-12 eggs. These are incubated for 12-16 days and fledge at around 20 days. They usually only produce one clutch. A second one is rare.