Keen Sight. The roc has advantage on Wisdom (Perception) checks that rely on sight.
Actions
Multiattack. The roc makes two attacks: one with its beak and one with its talons.
Beak. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 27 (4d8 + 9) piercing damage.
Talons. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 23 (4d6 + 9) slashing damage, and the target is grappled (escape DC 19). Until this grapple ends, the target is restrained, and the roc can't use its talons on another target.
RollQuest summary Senses: passive Perception 14. Languages: None. Saving throws: Dex +4, Con +9, Wis +4, Cha +3. Skills: Perception +4. Speed: 20 ft., fly 120 ft.
RollQuest ships the D&D 2014 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.