In the last few years, we've had a lot of research in ornithology, given some rather advanced tools we have, to understand that birds have advanced communication systems within species and across species. There's always been this traditional belief that one could communicate with them or that there was communication back and forth.
I think the best example I can give is a bird called the honeyguide in east Africa. It has a type of speech—this is coming from the anthropologists who study it—and it seeks out honey, but it uses people to do so, and vice versa. There are several studies that have shown that the Hadza people, hunter-gatherers in Tanzania, have a type of language where they communicate with birds. Birds will come to them and basically guide them to where the honey is.