Hummer-still pics--[Post note: probable Black-chinned]

[POST NOTE: I have requested and received feedback from several members of the Texbird listserve, including those with considerable experience and expertise, that all agreed this is not an Ann's Hummingbird. They all also agreed that it is, or it is suggestive of, a Black-chinned Hummingbird.]
Not the best pics but these may provide more clues for an identification. Double-click on each pic for enlarged views. SeEtta