Johnny Manziel -- Flips Off Redskins Bench ... On 'Monday Night Football'

Ornithologists in the Washington D.C. area got quite a treat Monday night ... when the rare caucasian middlepecker appeared at FedEx Field during "Monday Night Football."

The bird appeared during the 3rd quarter of the Browns vs. Redskins game ... right after Johnny Manziel threw an incomplete pass and started jogging away from the Redskins bench.

So the question ... will the stunt fly with the Browns honchos ... or is he totally flocked?