By Bruce Campbell, Karl Aage Tinggaard
By The Barn Owl Trust
By Ford, Sarah
By Atkinson, Robert
By Burger Cillie, Ulrich Oberprieler
By Greg Pyers
By Terry Jennings
By Dennis, Roy
By Darlington, Miriam
By Heinzel, HERMANN, Fitter, R. S. R., Parslow, John
By DK
By Perlo, Ber van
By Ashton, Nicholas
By Peterson, Roger Tory, Mountfort, Guy, Hollom, P. A. D.
By Hume, Rob, Hayman, Peter
By Brewer, Duncan, Harris, Alan
By Flegg, Jim
By Evans, P G H, Peter
By Raine, Andre
By Burrows, Steve
By Burnie, David
By Golley, Mark, Moss, Stephen, Daly, David
By Bodden, Valerie
By Sinclair, Ian, Ryan, Peter
By Campbell, Donald
By van Perlo, Ber
By Alerstam, Thomas
By Grant