Scientific Views of Nature

While sitting outside observing the nature around me, one of the things I noticed was the birds chirping around me. I began thinking about all the different bird sounds that we have discovered and wonder how many more there are that we are still unaware of. I know that each type of bird is known for its distinct bird sound but I wonder how much they can actually communicate with each other through that one sound.Just some things to think about the next time you hear a bird call.