Hyena (CR 1)

Medium Animal
Alignment: Always neutral
Initiative: +2 (Dex); Senses: low-light vision, scent, Listen +6, and Spot +4

AC: 14 (+2 Dex, +2 natural), touch 12, flat-footed 12
Hit Dice: 2d8+4 (13 hp)
Fort +5, Ref +5, Will +1
Speed: 50 ft.
Space: 5 ft./5 ft.
Base Attack +1; Grapple +3
Attack: Bite +3 melee
Full Attack: Bite +3 melee
Damage: Bite 1d6+3
Special Attacks/Actions: Trip
Abilities: Str 14, Dex 15, Con 15, Int 2, Wis 13, Cha 6
Special Qualities:
Feats: Alertness
Skills: Hide +3*, Listen +6, and Spot +4
Advancement: 3 HD (Medium), 4-5 HD (Large)
Climate/Terrain: Warm deserts
Organization: Solitary, pair, or pack (7-16)
Treasure/Possessions: None

Source: Monster Manual

Attach (Ex): If a hyena hits with its bite attack, it uses its powerful jaws to latch onto its opponent and automatically deals bite damage each round it remains attached. An attached hyena has an AC of 12.

*Hyenas have a +8 racial bonus to Hide checks in areas of tall grass or heavy undergrowth and a +4 racial bonus to Survival checks when tracking by scent.