The language of birds

I don't speak it, but I wish I did. I note that in some of the old myths, such as the one about Sigurd, it is because he can understand the language of the birds that his life is saved. I have lots of bird feeders around my house. I do sunflower seed, cracked corn, peanuts and suet. I pay a lot of attention to them and its an important part of my life. (I recently had two nuthatches tattooed on my leg). A week or two ago I spotted my first red-wing blackbird, and today the grackles showed up. This is very early in my experience. The robins (although not bird-feeder birds) have been around all winter, again very odd. We now have turkey vultures around for a good part of the year and I know last fall I saw a squadron of swallow-tail kites--who my Audubon books say only go north as far as North Carolina. I haven't seen a grosbeak or a waxwing this season.

I wonder what the birds have to say about this. I'm afraid that even though I don't speak the language, I know the answer.