The recent Tsunami in December 2004 that devastated parts of Indonesia, Thailand and Sri Lanka renewed interest in the seeming existence of a sixth sense in animals. One of the devastated areas was an animal reserve at Yala in Sri Lanka with monkeys, leopards, buffalo, elephants and 130 species of birds. But after the Tsunami and the unfortunate death of many tourists, virtually no animal carcasses were found. How did the animals escape the tidal wave?
Many examples of what people call a sixth sense, are probably just enhanced versions of the stable of five senses, sight, hearing, taste, touch and smell.
Perhaps the 'sixth sense' should be a genuinely new sense that is different to the standard five, so has different kinds of receptors.
Some level of 'sixth sense' is a prize available to humans if they seek to understand and bond with nature, and realise that nature has more to teach.