Converted to 3rd Edition from the 2nd Edition Mystara Monstrous Compendium Appendix TSR 2501.
Robert J Schwalb
robert84@mindspring.com
		Bird, Lesser Piranha
Diminutive Beast
Hit Dice: 1/2d10 (3 hp)
Initiative: +5
Speed: Fly 90 feet (Perfect)
AC: 19 (+5 Dex, +4 Size)
Attacks: Bite+4 melee
Damage: Bite 1d4-5
Face/Reach: 1 ft./ 0 ft.
Special Attacks:  Rend 1d4
Special Qualities: Low-light vision, Darkvision 60 ft.
Saves: Fort+2, Ref+7, Will+0
Abilities: Str 1, Dex 21, Con 11, Int 3, Wis 10, Cha 8
Skills: Listen+3, Spot+3
Feats: Weapon Finesse (Bite)
						
Climate/Terrain: Any Non arctic Forest
Organization: Solitary, Pair, Wing (1d4+2), Flock (1d4 wings of 1d4+2 birds)
Challenge Rating: 1/4 
Treasure: None
Alignment: Always Chaotic Neutral
Advancement: 2HD-3HD (Small)

The Piranha bird certainly lives up to its namesake, in that these birds shred any and all living creatures that they encounter. Multicolored feathers’, ranging from red through blue, the piranha bird is easily identifiable. Instead of a beak, two rows of razor sharp teeth fill their gaping maws. These birds lurk in deep in temperate forests, preying upon native wildlife. Unfortunately, they are devastating to their inhabited ecosystem, wiping out much of the smaller mammals.

Combat
Whenever the Piranha bird attacks in a group, it receives a +2 circumstance bonus to all attack rolls. Furthermore, if three or more birds hit, they may rend for an additional 1d4 points of damage for each round until they are removed. 

Greater Piranha bird: The Greater piranha bird looks identical to the smaller species, except they can grow up to 2 ½ feet long.