The habits of a needle-toothed tetrapod which lived more than 370 million years ago have filled in a piece of the evolutionary puzzle after an international team of palaeontologists pieced together fossilized skeletons and found unusual characteristics such as a crocodile-like skull with high positioned eyes would have been used to ‘keep an eye’ on prey before it used its slender needle-like teeth and elastic jaw to snatch its kill and crush it to death.