Night night. But I could use some help identifying this waterfowl. Stays quite flat on the surface of the lake, then dives (making pretty patterns).
Good night, sweet dreams. Sleep well. 
Nary a clue. Sorry. 
Good Night! 🌙
Drowning Duck?
Drowning Duck?
Good night. I dunno about the waterfowl.
I wonder if it's related to this bird?
Anhingas are Stealth Predators Under Water! - Nature...
Anhingas are Stealth Predators Under Water! - Nature...
good night 
Maybe a baby Nessie.
G'nite! 
May your sleep be restful 
Good Night!!!
sorry
Night night, mimi.