Those thrushes don't land to just nap for 9 seconds and then take off. They sleep for 9 seconds during a longer rest period, because they have to stay alert. Th

Those thrushes don't land to just nap for 9 seconds and then take off. They sleep for 9 seconds during a longer rest period, because they have to stay alert. They can't fly during the day because of airborne predators.