n large aberration 

Perception +16; motionsense 30 feet

Skills Acrobatics +16

Str +4 Dex +5 Con +2 Int -4 Wis +4 Cha +0

Motionsense A flying skrik nettle can detect the movement of nearby creatures and objects from the tiny gusts of wind created by their movements. This is a precise sense at the listed range, but it works only against creatures and objects that moved through air in the previous round.

AC  22; Fort +10, Ref +17, Will +14

HP 130, fast healing 5; Weaknesses piercing 5, slashing 5

Spill Venom [R] Trigger The skrik nettle takes piercing or slashing damage; Effect The skrik nettle ejects its venom onto an adjacent creature. That creature is exposed to skrik nettle venom.

Speed 10 feet, fly 25 feet

Melee [>] beak +17 (agile, finesse, reach 10 feet), Damage 2d8+6 piercing plus skrik nettle venom

Negate Levitation [>] (evocation, primal) The skrik nettle attempts to counteract (with a modifier of +17) a single effect currently levitating a creature it can detect with its motionsense.

Skrik Nettle Venom (evocation, poison, primal) Saving Throw DC 27 Fortitude; Maximum Duration 6 rounds; Stage 1 clumsy 1 and levitate upward 5 feet (1 round); Stage 2 clumsy 2 and levitate upward 10 feet (1 round)

Bestiary 2, page 242.