n large animal 

Perception +6; low-light vision

Skills Acrobatics +9, Athletics +10

Str +4 Dex +3 Con +3 Int -4 Wis +0 Cha +0

AC  17; Fort +11, Ref +9, Will +4

HP 30

Speed 50 feet

Melee [>] beak +10 (reach 10 feet), Damage 1d8+4 piercing plus tearing clutch

Melee [>] talon +10 (agile), Damage 1d6+4 piercing plus Knockdown (page 305)

Sprint [>>] Frequency once per minute; Effect The terror bird Strides three times in a straight line.

Tearing Clutch The terror bird's powerful beak can tear through flesh. On a successful beak Strike, the target takes 1 persistent bleed damage. This bleed damage increases to 1d4 on a critical hit.

Bestiary 3, page 264.