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.
They tend to require less time to mature than most others (one notable bird is the ancient murrelet - http://en.wikipedia.org/wiki/Anc... - which runs out to sea at just 2 days old, although its parents feed it for several weeks afterwards). Altricial birds, on the other hand, tend to be totally helpless, and often take longer to mature.