Autumn Meadowhawk
I still think of Sympetrum vicinum as the Yellow-Legged Meadowhawk, because that's what it was called in the first dragonfly field guide I ever owned. In 2004 the Common Names Committee of the Dragonfly Society of the Americas decided the old name was too confusing, because as vicinum matures it changes from yellow to red, and the legs become reddish brown. The whole idea of having a committee that establishes official common names seems bizarre to me, but since most of these names were made up by the DSA in the first place and are no older than 1978 -- and since the old name really is kind of confusing -- I go along with it when I remember.
The new name reflects the fact that Sympetrum vicinum is an unusually cold-tolerant species. In Minnesota, if we don't get a hard frost, they can still be flying in November. It's very possible to see them perching near autumn leaves. But by the time the leaves have changed colors, so has the Autumn Meadowhawk -- it should be red, not bright yellow. Actually I took these photos in July and the leaves in the background are just dying.
( One more photo )