Tuatara / Chester Zoo

A unique Tuatara has hatched at Chester Zoo. It is a species believed to have pre-dated the dinosaurs, having been on the planet more than 225 million years. This is also the first ever breeding of Tuatara outside of their native New Zealand. The egg from which the youngster hatched was laid on 11 April 2015, and it hatched on 5 December. The rare newcomer arrived weighing 4.21 grams — via ZooBorns