Sorry meant Kurt not Paul.
I don't want to sound like a smart *** know it all but those pics of the leptopelis natalensis are incorrect. Not all of those are Forest Tree frogs, the are all leptopelis but only a few pics are natalensis. The first pic in the row is actually the Long Toes Tree Frog (Leptopelis xenodactylus)
and the brown one is the Brown Back Tree Frog (Leptopelis mossambicus). The second one on the bottom row look like it could be more far north, perhaps Angola or Cameroon but not too clued up on the localities of African species.