Letters

01 February 1999 Comments Letters Although there have been many letters and papers in recent ornithological publications on the status of the Ruddy Shelduck Tadorna ferruginea in Great Britain, often with reference to the big influx into northwest Europe in 1892, all have missed what c...
Read More

Letters

01 December 1966 Comments Letters Week-end bias, length of stay of rarities and proportion of rarities undetected Sirs,--Although the effect of 'week-end bias' (the increased watching at week-ends) is often commented on, there appear to be no figures to show exactly how marked it is. In a...
Read More

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now