Very nice shots Brendan. I think you are mistaken about your "tree swallow". Tree swallows ( Tachycineta Bicolor) have a pure white breast in both immature and adult and both sexes. I think that if you do your research you will find that this bird is a Eastern Phoebe ( Sayornis Phoebe) which does have some mottling at the top of the breast between the shoulders or the wing base.


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