The Black-chinned Hummingbird is, in the words of the Cornell Lab of Ornithology, "a small green-backed hummingbird of the West, with no brilliant colors on its throat except a thin strip of iridescent purple bordering the black chin, only visible when light hits it just right." Their distribution is widespread throughout the Western U.S., all the way up to Canada and down into Mexico. These images were captured in late April of 2016 in Portal, Arizona. The light was diffuse, and it is hard to see the iridescent purple bordering the black chin. For excellent photos of this bird by Tom Grey, see his website here.