Tuataras inhabit moderately cold areas. Their low metabolic rate allows them to survive in temperature conditions that may reach near freezing during some parts of the year. The majority of the day is normally spent in burrows, but animals will bask on sunny days. At night, tuataras will actively search for food, which includes beetles, spiders, small lizards, seabird chicks, and eggs. Adults have even been known to cannibalize younger tuataras as well.
Movement is normally slow.
However, tuataras can make a hasty retreat if threatened. When alarmed, males will normally stiffen their crests and gape their mouths. Females tend to be more shy and will seek refuge if in jeopardy. If captured, tuataras will emit loud medium pitched vocalizations for defense. Animals may also attempt to bite.