Ok, one more response. Think your hummingbird may, indeed, be female, as you noted, & a Black-chinned. Couldn’t get a photo, & the eye patch wasn’t as black as on yours. However, this evening I had a definite female BC arrive at the feeder with quite dark, not fully black & not as triangular, patches around both eyes. Perhaps, yours had a melanistic trait causing the increased markings around the eyes. 

 

In any case, it’s been interesting researching possibilities for your bird. Glad you posted. Have enjoyed pondering the possibilities!

 

Brian Carrigan 

Blackfoot