November 1996 – vol. 89, issue 11, pp 534–537 When the latest issue of your favourite magazine arrives through the letter box, do you open it and promptly shake it over the litter bin? All those inserts are presumably disposed of immediately in countless households, at least judging by the comments we hear from many birdwatchers. The advertisers, however, must feel that the expense is justified or they would have stopped using inserts years a... This article is only available to subscribed users.To read more, please log in or purchase a subscription.