A Mystery from Guyana

Like anyone else with sense, I love jacamars, and so I lingered over last November’s poor images of Paradise Jacamars when I was moving them to flickr tonight.

Quite a bird, as sharp at one end as at the other!

One of my photos, though, offered up a surprise–and a mystery.

In flagrant violation of Rule 2 for Successful Birding, I was looking at the stupid viewfinder when something flashed across the background.  What is it?

Is it really blue? I’m at a loss, never having seen a Cotinga cotinga fly.