I am having trouble with a hummer I saw today, I won't write a paragraph, but more or less I have narrowed it down to fem/imm black-chinned vs anna's. This is a location where BCHUs are not surprising, but there are a few anna's around as well. Structurally it seems not as compact as an anna's and it seemed to have white tips to all tail feathers. Behaviorally it did not seem like the anna's up there, it flew up slope like a migrant, stopped at some sticky monkey flowers and was on its way.
Here is the link to the list with the images in it: https://ebird.org/checklist/S108909485