These are both females:


Finding black hairstreak was a great success, but we were in for better! As we left the first site, a magnificent male poplar admiral did an aerobatic manoeuvre next to us and landed on the path ahead!

This butterfly is truly the king of the forest. Scarce everywhere, and highly elusive, it is something I see at a rate of about one a year on average, and I have never before had one stop for more than a few seconds anywhere near me.
He wasn't pristine, but was quite glorious - majestic and dignified but trimmed in rather extravagant blue:

When he first landed, a dingy skipper alighted on him and remained there for about a second before jumping off. We both missed the money shot but here is the dingy skipper next to His Majesty (not, of course, His Imperial Majesty, a title reserved for purple emperors):

Watch the antennae in this video clip (apologies for Matt's profanity at the beginning...):
http://www.youtube.com/watch?v=-OfHAGvP4_c[/video]
Here's another quick clip:
http://www.youtube.com/watch?v=Kmig_0w6228[/video]
Good photos were difficult because it was hot and he clung to the shade:

But flash brought out his colours:

He was really very tame:

The day could only really go down after that but we did find several Reverdin's blues, which are always a joy:



(female on right)
Guy