Dragon, Green Young (CR 4)

Medium Dragon (Air)
Alignment: Always Lawful Evil
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, and keen senses
Languages: Draconic

AC: 20 (+10 natural), touch 10, flat-footed 20
Hit Dice: 11d12+22 (93 hp)
Fort +9, Ref +7, Will +8
Speed: 40 ft., fly 150 ft. (poor), swim 40 ft.
Space: 5 ft./5 ft.
Base Attack +11; Grapple +14
Attack: 1 Bite +14, 2 claws +9, 2 wings +9 melee; Breath +14 ranged
Damage: 1 bite 1d8+3, 2 claws 1d6+1, 2 wings 1d4+1, Breath weapon 2d6 (17)
Special Attacks/Actions: Breath weapon
Abilities: Str 17, Dex 10, Con 15, Int 12, Wis 13, Cha 12
Special Qualities: Acid immunity, water breathing
Feats: #Feats: 4
Skills: Skill Points: 77
Advancement: 12-13 HD (Medium-size)
Climate/Terrain: Temperate and warm forest and underground
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard

Source: Monster Manual

Breath Weapon (Su): A green dragon has one type of breath weapon, a cone of corrosive (acid) gas (Reflex save for half damage DC 17) 6d6 acid damage. Using a breath weapon is a standard action. Once a dragon breathes, it can't breathe again until 1d4 rounds later. A blast from a breath weapon always starts at the dragon's mouth and extends in a direction of the dragon's choice.

Water Breathing (Ex): The dragon can breathe underwater indefinitely and can freely use its breath weapon, spells, and other abilities while submerged.

Air Subtype

This subtype usually is used for elementals and outsiders with a connection to the Elemental Plane Air. Air creatures always have fly speeds and usually have perfect maneuverability (see the section on Movement).