Each piece of baggage in excess of the free baggage allowance specified above that is not in excess of 62 inches (L+W+H) and 50 lbs. or less will be accepted for a charge of $75.00 per item one-way.
Best Answer: The standard is 10 to 12 hours a night. This is normally what birds sleep...seasonally a little more or less, depending on daylight hours. Most birds sleep when it is dark. In the wild, dark means danger.
Dr. Niels Rattenborg has studied sleep patterns of birds, including ducks. He monitored the brain waves of ducks as they sleep and learned some interesting things. Ducks often spend the night together as a group, often sleeping in a row. The ducks on the end of the row or outside of the group are easily spooked by any movement nearby. They sleep with their eye away from the group open, while the other eye is closed. Rattenborg found that one of the hemispheres of the brains of these outside ducks was functioning at 100% capacity while the other hemisphere was in sleep mode. Apparently the duck has the ability to sleep with half the brain at a time asleep while the other half is fully responsive to the environment.