Garuda "king of all birds" +
Bird of Tyaa +

Birds are found across the world in many shapes, forms
and colours. They are distinguished from one another by plumage,
size, beak shape, body length, wing size and talon type,
as well as by dietary habits. Those that fall into a similar size
range are provided for here and below; most are two or three
feet long, weight up to about three pounds and have a wing
span of around four or five feet.

Normal
FREQUENCY: Common
NO. APPEARING: 1d20
ARMOR CLASS: 6
MOVE: 30 feet, flying 360 ft (Aerial Agility: Level IV)
HIT DICE: 1
% IN LAIR: 20%
TREASURE TYPE: Nil
NO. OF ATTACKS: 3
DAMAGE/ATTACK: 1-2/1-2/1
SPECIAL ATTACKS: See below
SPECIAL DEFENSES: None
MAGIC RESISTANCE: Standard
INTELLIGENCE: Animal
ALIGNMENT: Neutral
SIZE: S
LEVEL/X.P. VALUE: I | 15 + 1

Huge
FREQUENCY: Rare
NO. APPEARING: 1d20
ARMOR CLASS: 5
MOVE: 30 feet, flying 360 ft (Aerial Agility: Level IV)
HIT DICE: 2
% IN LAIR: 20%
TREASURE TYPE: Nil
NO. OF ATTACKS: 3
DAMAGE/ATTACK: 1-4/1-4/2
SPECIAL ATTACKS: See below
SPECIAL DEFENSES: None
MAGIC RESISTANCE: Standard
INTELLIGENCE: Animal
ALIGNMENT: Neutral
SIZE: S
LEVEL/X.P. VALUE: II | 40 + 1

Giant
FREQUENCY: Very rare
NO. APPEARING: 1
ARMOR CLASS: 7
MOVE: 30 feet, flying 360 ft (Aerial Agility: Level IV)
HIT DICE: 4
% IN LAIR: 20%
TREASURE TYPE: Nil
NO. OF ATTACKS: 3
DAMAGE/ATTACK: 1-6/1-6/2-12
SPECIAL ATTACKS: See below
SPECIAL DEFENSES: None
MAGIC RESISTANCE: Standard
INTELLIGENCE: Animal
ALIGNMENT: Neutral
SIZE: M
LEVEL/X.P. VALUE: IV | 105 + 3