This snake has considerably large eyes with vertical pupils which are adaptations for its nocturnal lifestyle.

Like other night monkeys, the Panamanian night monkey has large eyes, befitting its nocturnal lifestyle.

Their nocturnal lifestyle may be helpful in the acquisition of prey.

The Kakapo has a well-developed sense of smell, which complements its nocturnal lifestyle.

It dwells at a depth range of 145-250 metres, and leads a nocturnal lifestyle.

The large eyes of Protoceratops has been suggested as evidence for a nocturnal lifestyle.

He worked six to midnight four days a week and had long since shifted over to a nocturnal lifestyle.

How this ability fits with its nocturnal lifestyle and underground natural habitat is still under study.

This is especially useful for passerine birds that develop nocturnal lifestyles.

The nocturnal lifestyle may have contributed greatly to the development of mammalian traits such as endothermy and hair.