DINOSAUR  GIANT PTEROSAUR
Huge Beast
Hit Dice: 6d10+18 (51 hp)
Initiative: +2 (Dex)
Speed: 20 ft, fly 60 ft (poor)
AC: 15 (-2 size, +2 Dex, +5 natural)
Attacks: Bite +6 melee
Damage: Bite 2d6+6
Face/Reach: 10 ft x 20 ft / 15 ft.
Special Attacks: Improved grab, diving grab
Saves: Fort +8, Ref +7, Will +3
Abilities: Str 19, Dex 14, Con 16, Int 2, Wis 12, Cha 7
Skills: Move Silently +0*, Spot +8*
Climate/Terrain: Any warm land 
Organization: Solitary or pair
CR: 4
Treasure: None
Alignment: Always neutral 
Advancement: 7-12 HD (Huge); 13-18 HD (Gargantuan)
This ghastly looking creature, with its 10-foot long snake-like neck and long, toothy jaws, is a nightmare to behold. Its body is generally only about 10 to 15 feet long, but its wingspan in flight is nearly 50 feet. 
COMBAT
Improved grab (Ex): To use this ability, the giant pterosaur must hit a creature of Medium size or smaller with its bite attack. If it gets a hold, it inflicts bite damage each subsequent round, and may choose to fly off with its victim. Although a giant pterosaur weighs only about 150 to 200 pounds, it may carry opponents of up to twice that weight in flight. 
Diving grab (Ex): If the pterosaur catches an opponent flat-footed when attacking from the air, it has swooped down at double speed as a charge attack and does double damage if it hits. 
Skills: Pterosaurs receive a +3 racial bonus to Spot checks. *This bonus increases to +6 when flying during daylight hours; pterosaurs have a +8 racial bonus to Move Silently when in flight.