*makes a howling sound when hungry, sad, angry, happy, etc* *Flaps arms* *Bites, scratches, hits when angry* *Knows sign language but can't comprehend it as much* *Claps, hops up and down, flicks fingers, drools in stimming* *Becomes louder when angry* *Can't understand boundaries, taps chin and/or teeth on other's shoulders, invades space, etc* *Tends to try and claim and eat other's foods when he senses it*