Louisiana Waterthrush

This little guy is very unique in it behavior. Went on a small hike with my fiance to a local wildlife education center in the Poconos PA called Kettle Creek. It started off bad without a single bird sited. We circled back to this mucky pond that had a downed tree. We noticed this Louisiana Waterthrush putting on a show for us. He had a bumblebee in his mouth. It was hard to land any decent shots of him due to the fact that he does not stop moving. One unique thing with this bird. They shake their rump constantly bobbing it up and down. It was quite the show. I am curious why they do this so off to research for me. If you ever come across one of these, they are by brooks and ponds and streams. They are kind of sparrow size and will always be spotted low on the ground near water. Good luck in your searches.