Initially this smaller (than others) was pretty aggressively chasing away Darners, Flame Skimmers, etc.. I don't think this one ever perched; constant flight and patrolling.
Tracks
second shot is with no post-editing.
Credit : คุณนุวัตร์ พันธุ์สุวรรณ
Credit : คุณนุวัตร์ พันธุ์สุวรรณ
I think I agree with the black bear ID. The track was on a muddy/clayey section of the trail and was particularly deep.