Stilt-Legged Fly (Rainieria antennaepes)

On foliage at a dense mixed forest edge.
The species name "antennaepes" translates to "antenna foot." Rainieria antennaepes is an effective ichneumonid wasp mimic, often holding up its front two legs and waving them as if they were antennae.
You can really see the similarity here when comparing these two observations:
Christine Young's Mesostenus thoracicus