The publishers have written to everyone and will reprint a copy for anyone holding a duff one.
British Birds April 2013
The April issue of
British Birds is now out.
BB eye
Ghosts… and American Goshawks, by Conor Jameson
Organochlorine pesticides and birds
In the second paper in our series to mark the research interests of Stanley Cramp, Ian Newton looks at the impact of pesticides on birds over the past 50 years or so. His paper summarises the way in which the organochlorine pesticides affected both individuals and populations, and describes how patterns of recovery followed the control and withdrawal of the pesticides involved. Some more recent problems with pesticides are also described, including deliberate poisoning of raptors, incidental poisoning by rodenticides and problems relating from the use of veterinary products.
Avian drop-catch play: a review
Repeated dropping-and-catching of non-food objects by birds in flight has been recorded in over 25 bird species, of which raptors, gulls and corvids are the most well represented groups. Drop-catching of prey objects has also been recorded. The evidence suggests that, for most species and in most situations, the behaviour is play. It may also serve the adaptive functions of physical training and practice of motor skills, among others. A few reports indicate that drop-catching might also be used in courtship display.
Autumn raptor migration over Malta
Raptor migration in Malta has been monitored regularly in recent years from Buskett, a wooded garden in the southwest of the island. Observations in autumn have long pointed to the relative importance of Malta for migrating raptors crossing the central Mediterranean. In recent years, systematic observations from other localities have shown that raptor migration occurs on a considerably larger scale than has been reported previously.
Obituaries
Geoffrey Matthews
Derek Yalden
Notes and letters
Breeding Baillon’s Crakes
Population estimates of birds
Thrushes on Holy Islands
White-tailed Laurel Pigeons
Reviews, News, Recent reports and Talking point complete the April issue.
For more details, and to see a recent issue of the magazine, visit our website at
www.britishbirds.co.uk