From page 17 of Birds of Botswana:
The best time to bird watch in Botswana is during the wet summer months. In addition to the 595 bird species currently on record, numerous migrants boost the population. Many of these birds breed during the summer and are conspicuous in their nuptial finery. A birder’s paradise!
Here is the ultimate field guide to Botswana’s stunningly diverse birdlife. Covering all 597 species recorded to date, Birds of Botswana features more than 1,200 superb color illustrations, detailed species accounts, seasonality and breeding bars, and a color distribution map for each species. Drawing on the latest regional and national data, the book highlights the best birding areas in Botswana, provides helpful tips on where and when to see key species, and depicts special races and morphs specific to Botswana. This is the first birding guide written by a Botswana-based ornithologist and the only one dedicated specifically to Botswana.
Portable and easy to use, Birds of Botswana is the essential travel companion for anyone visiting this remarkable country.