After visiting Baskett Butte on Monday and refreshing my knowledge of the endangered butterflies there, I couldn't help but wonder about some butterflies I saw two days before at Dog Mountain.
Here are two pictures of a Fender's Blue, the first from Cornell University's site and the second from butterflyrecovery.org.
Here's the butterfly that I saw on Dog Mountain.

Here's a picture that "Spoonie" took the same day (also at Dog Mountain) of a similar butterfly.
Typically, the biologists know a lot more than me, so I'm guessing this is a very similar looking different species. That begs the question of what the Dog Mountain butterflies are and how do we distinguish them from Fender's?
What do you suppose is around that next bend?