naps
Chinstrap penguins take thousands of very short naps every day
Chinstrap penguins sleep for a few seconds at a time benkrut/iStockphoto/Getty Images Chinstrap penguins are avid nappers, taking more than 10,000 a day – but each one lasts just 4 seconds. Dozing off for several short bouts every day is a common habit for birds. Pigeons, for example, can have hundreds of microsleeps a day,…