We had a fairly heavy overcast afternoon today in New Jersey.  While my typical approach to bird photography is to freeze any action, the increased exposure time lent itself much better to creative motion blurs.  I thought I would have some fun with this one, and allow viewers to guess the species name of the bird in the photo below.  It is a composite image, and both birds are the same species.

Motion blur capture of a bird in flight, this a two image composite. Photographed in New Jersey with the Tamron SP 150-600mm VC lens and the Canon EOS 7D.

Any guesses on what type of bird is flying in my frames?

I will disclose the information after I get a good number of guesses.  Photo taken with the Tamron SP 150-600mm VC lens and the Canon EOS 7D in New Jersey.