Puck, The Druid Familiar

Armor Class 11 Hit Points 1 (1d4-1)
Speed 5 ft., fly 60 ft.
Perception +3, Stealth +3
Darkvision 120 Ft., passive Perception 13
Flyby.
Doesn't provoke opportunity attacks when it flies
out of an enemy's reach.
Keen Hearing and Sight.
Advantage on Wisdom (Perception) checks
that rely on hearing or sight.