Hot upon the heels of the prairie dog story comes another about animal language. This time it’s elephants. And two different teams of researchers. There is one in San Diego Zoo, reported on by the BBC:
http://news.bbc.co.uk/1/hi/sci/tech/8527009.stm
And another at Cornell University with field workers in Africa, reported on at some length by CBS news:
http://www.cbsnews.com/video/watch/?id=6050249n
Essentially, they are claiming the same thing; that elephants make low frequency vocalisations which humans can’t hear, and which convey meanings, such as (in the zoo research) ‘I am about to give birth’. The CBS report has more detail and so I’ll concentrate on that.
As a piece of journalism, it has the high level of anthropomorphism you would expect, and you have to cut through all this to try to see what exactly the Elephant Listening Project at Cornell University is up to. As far as I can make out, they take extensive recordings of all elephant vocalisations, both audible and inaudible to humans, while observing very closely what the elephants are doing at the time. By matching sound with behaviour, they say they hope to compile an elephant ‘dictionary’. They have a few entries already: glad to see you, hit the road, I’m upset, everything is OK, here I am!