Jean Dorst - Birds - 1962 - 476 pages
Old explanations of bird migrations. Methods of studying migrations. Migrations in Europe and Northern Asia. Migrations in North american. Migrations in the Southern Hemisphere ...
John Dawson Skinner - Mammals - 1999 - 72 pages
Fully revised and updated, this popular guide describes and illustrates in full colour more than 90 of southern Africa's most interesting and more commonly seen mammals.