What can you tell about the size? Relative to the vegetation surrounding it the bird seems relatively small. It is holding its wings out a little and it has a somewhat long tail with some feathers worn. This bird has seen quite a tiring migration. It has a small short bill and round average-sized head. Even knowing what it is this profile strikes me as almost prototypical for a little songbird.
Still, the dimensions and positioning help betray the fact this is an insect eater. That tiny bill is somewhat pointed and definitely not meant for eating anything too hard. You can probably tell this is a warbler - but what kind? That would be quite a task, but do you remember what I said about cheating in the first post with this photo? I meant this "enlightening" look as we lower the quality of the image while markedly raising our ability to identify the bird...
That is a Canada Warbler that spent the morning singing and foraging around my yard. I hope it is at its breeding grounds so that it can relax, start a family, and then finally molt before the trip back.
Photos by Scott Kruitbosch © Connecticut Audubon Society and not to be reproduced without explicit CAS permission