4 books in series

Encyclopedia of the Animal World

Encyclopedia of the Animal World is a 4-book series with 4 released primary works first released in 1988 with contributions by Martyn Bramwell, Steve Parker, John Stidworthy, Robin Kerrod, Jill Bailey, and Linda Losito.

Mammals.
Mammals - Large Plant Eaters
Birds: The Waterbirds
Birds: The Plant-And-Seed-Eaters