This is the last of the Gnatcatchers I managed to photograph.
The Blue-gray Gnatcatcher (Polioptila caerulea) is a very small songbird, 10–13 cm (3.9–5.1 in) in length and weighing only 5–7 g (0.18–0.25 oz). From Wikipedia.
I stopped by this tree 2 days after these were taken and the branches were empty. Few leaves on this tree meant I could see up without having to make the 3 story climb up the nearby tower.