Perry, R & Chadwick, P / October 1950 – vol. 43, issue 10–344 --I am engaged in investigating t h e ringing records of Blue Tits. Amongst the known causes of death it is astonishing to find that the mousetrap is a principal one. I t may be necessary to place r a t and mouse traps in gardens, b u t I suggest that they should be placed under a tunnel of stones or bricks. Tunnel traps are more effective for vermin and they protect such valuable garden birds as ... This article is only available to registered users.To read more, please log in or purchase a subscription.