Do you sleep like a bear, wolf, lion or dolphin? 

Australian sleep expert Olivia Arezzolo says identifying your type of sleeping pattern can help you to wake up feeling more refreshed 

Dolphins are very poor sleepers.

The next time someone complains of feeling tired, ask them if they’re a bear, wolf, lion or dolphin.

Believe it or not, these animals refer to four types of sleeping patterns, or chronotypes, identified by Australian sleep expert Olivia Arezzolo.