July 1960 – vol. 53, issue 7–310 1959 OBSERVATIONS were made on the behaviour of a pair of House Sparrows (Passer domesticus) rearing their second brood of young in an observation nest-box in the suburban district of Pinner, Middlesex. Fixed near the eaves of a house and eighteen feet above the ground, the box was outside the top of an open window. Watch was kept at a distance of eighteen inches from the interior of the room whic... This article is only available to registered users.To read more, please log in or purchase a subscription.