The Deinonychus from the first film were replaced by Velociraptors in the sequel. However, the exact same Deinonychus costume molds from the first film were used to create the bodies for the Raptor costumes; only the heads/necks were changed to reflect the longer neck and snout that distinguish the two dinosaurs. Close-ups were achieved using puppet heads with mechanical devices. See more
Mo, you stay with this.
Yeah, ok, alright, sure, just leave me alone. Do all the work. I ain't scared.
[he hears a bang and looks behind him with a frightened look on his face
Yeah, Mo do this, Mo do that. Make him run around in tunnels and shit.