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.
Although most species sleep at night (because hunting for food isn't that easy, especially if you're hunting for insects), many can find their way around in the dark. We know this because many species of birds migrate only at night (they use, among other cues, the stars to migrate, so they do need some points of light).