This is Breviceps Macrops, a frog native to a small area in South Africa and Namibia fronting along the coastline. They spend their lives buried in sand, feeding on insects, and when threatened by predators, they sound like a baby kitten/squeaky chew toy. Seriously.
Wildlife photographer Dean Boshoff managed to get close enough to hear the bellowing roar of the rare amphibian. Due to habitat destruction, these unique frogs are considered vulnerable by the IUCN.