British Tits (Collins New Naturalist Library, Book 62)In addition to dealing with the general biology and behaviour of the birds, Dr Perrins gives full attention to such things as their social lives, their intelligence and adaptiveness, and their puzzling ability to adjust their population sizes to the future availability of food. This edition is exclusive to newnaturalists. com Because of their ubiquity and apparent boldness, the tits are among the most easily observed, and the most popular, of all