early morning

For the first time this spring, I heard birds before my alarm went off - which means it is getting light earlier, which means that getting out of bed will get easier. I love to wake to the chorus of robins as the day breaks. There are lots of birds around here that sing, and I enjoy them all, but somehow, that sunrise song that the robins sing makes it seem as though the whole forest is full of them. I don't understand how these small creatures can make such large and lovely sounds.