Test your birdie knowledge

This little birdie says "Do you know who I am??" He has come to our feeder for the third day in a row! We've never really seen him a'fore so I figured I should do some 'vestigating. I searched and found out who he is! Now... can you do the same? Here's what I knew. He was kinda small, but not as small as the chickadee. And not as big as the blue jay. He has a very handsome brown head, and a little bit of brown on the very tip of his wings. The rest of him is black. He sang a song for us that sounded like two very high glissando notes. Once he caught sight of me, he flew away so that's all I had to go by! Well, Mommy did have the picture for some help. But, now it's your turn to see if you can figure out the name of this birdie!
I was amazed to find out the answer myself! I don't think I've ever seen this kind of birdie around here a'fore and Mommy says it's a first time for her too! When I started looking up some of this information on the internet, I heard his song again. I went to the window and guess what? There was another kind of birdie there with him! Now, I thought, shmaybe it was his girl so I did some research and found that it was indeed his wife! They have quite the story to tell so, once you think you know who it is, go to my "wildlife watch" and see if you are correct! No cheating!!