Great tit chicks. In the winter of 1946-47, a new student at the EGI, John Gibb, erected nesting boxes in and around Marley, part of Wytham Woods. He also erected a small garden shed in which he lived for each of the three following summers. The first breeding season was 1947, so that in 2013 will be the 67th; possibly no other bird population has been continuously studied for so long in a single place.