There is substantial prior discussion of this here on HN. I can't use search from this browser, but if you think the HN community is worth listening to, you might want to search for "Prarie Dogs".<p><i>Typed on my bloody useless Blackberry - don't ask.</i>
> Also remarkable was the amount of information crammed into a single chirp lasting a 10th of a second.<p>> "In one 10th of a second, they say 'Tall thin human wearing blue shirt walking slowly across the colony.'"<p>Millions of years of evolution at work. We're still a young species here.