Rohch, Forest (CR 1)

Tiny Aberration
Alignment: Always neutral
Initiative: +3 (Dex); Senses: scent, tremorsense, Listen +4, and Spot +4

AC: 16 (+2 size, +1 natural, +3 Dex), touch 13, flat-footed 13
Hit Dice: 1d8 (4 hp); DR: 5/magic
Fort +0, Ref +3, Will +2
Speed: 40 ft.
Space: 2.5 ft./0 ft.
Base Attack +; Grapple +
Attack: Bite +0 melee and 2 claws -2 melee
Damage: Bite 1d2-2, claw 1d2-2 melee
Special Attacks/Actions: -
Abilities: Str 7, Dex 16, Con 11, Int 2, Wis 11, Cha 6
Special Qualities: -
Feats: Multiattack (B)
Skills: Listen +4 and Spot +4
Advancement: 2-3 HD (Tiny)
Climate/Terrain: Any forest
Organization: Pack (10-100)
Treasure/Possessions: None

Source: Web

Scent (Ex): A rohch can detect approaching enemies, sniff out hidden foes and track by sense of smell.

Tremorsense (Ex): A forest rohch can automatically sense the location of anything within 30 feet that is in contact with the ground.

Rohches swarm over anything that they consider prey (which is everything) when they are hungry (and they almost always are). Usually, they do not attack something much larger than they are, unless they have an overwhelming advantage in numbers.