Lizardlike reptile Sphenodon punctatus, found
only on a few islands off New Zealand. It
grows up to 70 cm/2.3 ft long, is greenish or
black, and has a spiny crest down its back.
On the top of its head is the pineal organ,
or so-called `third eye', linked to the
brain, which probably acts as a kind of light
meter. It is the sole survivor of the
reptilian order Rhynchocephalia. It lays eggs
in burrows which it shares with seabirds, and
has the longest incubation period of all
reptiles (up to 15 months).