They say you can tell alot about the quality of a lake from the dragonflies. My lake must be very healthy despite all the excessive hydrilla. Dragonflies are all over, buzzing about,  some in pairs, some solo, and some riding piggyback! I see eggs clustered on lake plants to assure the future of these beautiful and intricate creatures. They zip from point A to point B, then quicky decide on another location. Somehow they never seem satisfied with their choices. I usually find a few stuck on the porch screen, I cup them in my hands and sometimes they bite, which is really a cute little pinch of hello, and sometimes they sit for a minute as if to say thank you. So I in turn will thank them for their lovely interludes.