Speaking of animals communication, i just want to throw something in there. Whales could communicate with each other over vast distances. Sometimes these distances are so great that one of the whales can be around New York and the other near the Great Barrier Reef in Australia. Nowadays, merchant vessels drone is disturbing their abilities but several hundred years ago this was of daily occurence.
There is another point of interest - if a whale sang for 30 min. and stoppped his song at some point(stopped singing for long periods), that same whale would continue that same song from the exact point at which he stoppped sometimes a whole year later. Poor us, took us 50 thousand years to invent the internet and catch up with whales.