"Clive has been actively involved with conservation and environmental education for over 40 years. He founded the Endangered Wildlife Trust in 1973, and with his wife Conita he set up Educational Wildlife Expeditions which introduced many adults and children to the bush. From 1980 onwards he and Dale Parker established the Lapalala Wilderness Reserve, and in 1985 he founded the Lapalala Wilderness School, which he and Conita ran until their retirement in 2003. During this time he was instrumental in establishing the Waterberg Biosphere Reserve as well as the Waterberg Nature Conservancy. He is the author or co-author of numerous books about wildlife and conservation, including most recently The Rhino Keepers with his son Anton Walker." 
"Clive Walker entered the battle for the rhino with the founding of the Endangered Wildlife Trust in 1973. He co-founded the Rhino and Elephant Foundation and the African Rhino Owners Association, and served on the IUCN African Rhino Specialist Group for close on 14 years. He served as a member of the South African National Parks Board from 2000 to 2006." 
From 2012: "Clive Walker is the cofounder of the African Rhino Owners Association and the Rhino and Elephant Foundation. He served on the South African National Parks Board for more than 13 years and on the South African Parks Board for six years. Anton Walker is the general manager of the Lapalala Wilderness nature reserve in South Africa. " 
Resources and articles
- Lapalala Wilderness School People, organizational web page, accessed March 14, 2019.