The Desert rain frog is a species of frog found in a coastal strip of land about 10 kilometers wide in Namibia and South Africa. This area of sand dunes often has sea fog rolling in which supplies some moisture in an otherwise arid region. The locations in which this frog is found have at least one hundred foggy days per year.
The Desert rain frog has a very unique defensive cry that can be heard in this video...
Video source: YouTube
More information about this cute and unique frog on Wikiapedia