There is no one field guide which covers all the species found in Sudan.
Birds of Africa South of the Sahara covers most of the species found in the southern part of the country and a good Western Palearctic guide such as The Collins guide, in any of its forms, or the Lars Jonsson guide are probably the most comprehensive for the more northerly parts of the country.
Second edition, including 500 new images and 400 updated distribution maps. Unrivalled coverage of African birds in a single volume. 2129+ species covered with an additional 101 vagrants briefly described. Revised to reflect the latest changes in taxonomy. Species descriptions give precise identification features highlighting differences between similar species as well as briefly reporting habitat, status and call. Annotated illustrations portray distinctive plumages as well as diagnostic flight patterns and major geographic variants where applicable.
The most complete field guide to the birds of Britain, Europe, North Africa, most of the Middle East, the Canaries and Madeira. Written by one of Europe's leading ornithologists Lars Svensson (with a translation by David Christie) and illustrated by two of the world's finest bird illustrators - Killian Mullarney and Dan Zetterström. This book provides all the information needed to identify any species at any time of year, with detailed text on size, habitat, range, identification and voice.
Accompanying every species entry is a distribution map and colour illustrations (over 3500 in all) to show the species in all the major plumages (male, female, immature, in flight, at rest, feeding). The book is fully integrated, so that all this information appears on one spread, the ideal structure for use in the field. Each group of birds has an introduction, which covers the major problems involved in identifying or seeing them: how to organise a sea watching trip, how to separate birds of prey in flight, which duck hybrids can be confused with which species, etc.
The combination of definitive text, up-to-date distribution maps and superb illustrations, all in a single volume, makes this book the ultimate field guide, essential on every bookshelf and birdwatching trip.
Still one of the better field guides. Covers all but a few of the Western Palearctic's breeding birds. 400 superb colour plates by the author Lars Jonsson.