October passerine migration on the south Lancashire coast 01 January 1975 Comments Main paper ... Read More
The behaviour of adult tits towards other birds and mammals near the nest 01 January 1975 Comments Main paper ... Read More
Studies of some species rarely photographed: Tengmalm's Owl 01 January 1975 Comments Main paper ... Read More
A possible explination of paper-tearing behaviour in birds 01 January 1975 Comments Main paper ... Read More