One can’t say anything about the use of the third eye of this animal but certainly it had some use for these perhistoric animals. This animal is active at night. Generally it llives in burrows often in company with sea birds. It is a very shy and retiring animal. It eats insects other animals like frogs rats and eggs of birds also. The average life of a Tuatara usually does not exceed 77 years, but some Tuataras may live upto 100 years. It is a unique animal and represents a whole vanished order of reptiles. All other species except this one became extinct and only this particular type has lived unchanged till the present day In captivity it can live upto fifty years only. This strange animal is now facing extinction. The government of New Zealand has been making great efforts to prevent the extinction of this animal.