Biogeography is one of several falsifications of the flood and it has been discussed before on the Great Flood forum.
http://
EvC Forum: Biogeography falsifies the worldwide flood. -->
EvC Forum: Biogeography falsifies the worldwide flood.
As usual creationists could only answer, God must have done it somehow.
Fred Williams tried to answer it here
http://
EvC Forum: Evolution vs Creation -->
EvC Forum: Evolution vs Creation
But a little analysis easily showed that his attempts at explanation are total nonsense. Creationist often try partial answers to small parts of the problem as if it solved the whole problem but biogeography is a falsification of the flood myth that creationists have no real answer for other than "God did it".
Randy