did you read the link you supplied ,jack, on giant tortoise- something about large reserves of water and fat, making them ideal for long ocean crossing....reckon noahs crew did not have to do much for them!.
the bet! looking back, I think the challenge was for you to produce whatever evidence for evolutionism that is still the same since you learned it in your youth. the invitation to do so still stands but it seems you have backed off.
and so I will answer your kango challenge-   after the flood, land animals could have traversed seas on massive vegetation rafts, transported by men on boats, or now submerged land bridges, and fourthly a combination of the former.
be careful before you charge me with fanciful ideas - evolutionists posit this sort of thing too ,to explain global distribution and island hopping of animals and plant life.