Hello all! I was digging through some photos, and I found this shot, taken on January 6th, 2019, in Altadena, California.
Could it be a Costa's? The tail has some white on it, the tail barely meets the wing tips, and the throat seems pretty clean.
<a data-flickr-embed="true" href="https://www.flickr.com/photos/139504398@N05/33276095448/in/dateposted-public/" title="Hummingbird Sp. 1/6/19"><img src="https://farm8.staticflickr.com/7880/33276095448_5d5e9bbd2f_z.jpg" width="640" height="480" alt="Hummingbird Sp. 1/6/19"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>