There is strong evidence that telepathic communications amongst humans was common before the flood and was, in fact, the normal means of communication.
For evidence that some animals retain some of this capability, check out the story of the little African grey parrot Nkisi on Rupert Sheldrake's www site. Sheldrake is the former director of studies for cellular biology at Cambridge who you see occasionally on TV documentaries involving animal studies. He uses intelligent experiment design and statistical methodologies to study things which are normally termed paranormal. His "Seven Experiments Which Could Change the World" is also worth having. Paperback copies are around $15.
Huh? The Bible is the source for the global flood story that most creationists beliefe (geology does not back up the Biblical contention) and the Bible does not mention mental telepathy. As a matter of fact, I can't think of any flood legends which mention mental telepathy. You've evidently been reading Madame Blavatsky or one of her minions; most of that mythology was made up from whole cloth in the late 19th century.