The John Voelcker Bird Book Fund (JVBBF) is proud to publish Roberts Geographic Variation of Southern African Birds, an illustrated version of aspects dealt with under the subject of Geographic Variation in the large handbook tome Roberts Birds of Southern Africa 7th Edition.

Worldwide, this is the first field guide to attempt to comprehensively illustrate the varied plumages that are exhibited by the region's birds. Although sometimes a camouflage and defence mechanism against predation, many other factors contribute to plumage variation and it is hoped that this guide will stimulate the reader's interest in this complex subject so that we can further our knowledge on various subspecies, a concept that was brought to the fore a little over 100 years ago.

The colour maps (courtesy of Guy Upfold), are a guide to the distribution of the subspecies; included too are the meaning of scientific names (Etymology).

This information, together with 105 annotated plates illustrated by the exceptional talent of Ingrid Weiersbye, makes this guide essential for both beginner and expert birders.

The Roberts Bird Guide (2nd Edition) has gone to great trouble to concentrate on, and illustrate, difficult-to-identify species and family groups such as raptors, warblers, cisticolas and waders. Special attention has been given to make sure there is far greater coverage of male-female differences and there are also many more juvenile illustrations. Unlike all previously published southern African bird guides, this new edition will be scattered with informative photographs that are incorporated in the text pages and each plate illustration is augmented with an introduction. Apart from the approximately 240 plate spreads, the guide also has 12 photographic and illustrated double spreads that show head enlargements and other details. Plates are annotated far more definitively than other guides – highlighting key identification features, especially for difficult-to-identify species.

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. * Covers all 597 species of birds found in Botswana, including subspecies and color variants specific to Botswana* Features more than 1,200 color illustrations--with more than one illustration for species where the sexes and ages differ* Includes detailed species accounts, seasonality and breeding bars, and color distribution maps* Draws on the latest bird data and the expertise of leading birders in Botswana