n large animal 

Perception +10; low-light vision

Skills Athletics +10, Stealth +10 (+13 to Hide)

Str +5 Dex +3 Con +1 Int -4 Wis +3 Cha -2

Camouflage The giant chameleon can change its coloration to match its surroundings. It doesn't need cover to attempt to Hide with a Stealth check.

AC  18; all-around vision; Fort +8, Ref +12, Will +8

HP 60

Speed 30 feet, climb 20 feet

Tongue Grab If the giant chameleon hits a creature with a tongue Strike, that creature becomes grabbed by the giant chameleon. The target isn't immobilized, but it can't move beyond the reach of the giant chameleon's tongue. A creature can sever the tongue with an attack that hits AC 15 and deals at least 4 slashing damage. Though this doesn't deal any damage to the giant chameleon, it prevents it from using its tongue Strike until it regrows its tongue, which takes a week.

Bestiary 2, page 168.