If you put a buzzard in a pen that is 6 feet by 8 feet and is entirely open at the top, the bird, in spite of its ability to fly, will be an absolute prisoner. The reason is that a buzzard always begins a flight from the ground with a run of 10 to 12 feet. Without space to run, as is its habit, it will not even attempt to fly, but will remain a prisoner for life in a small jail with no top.

The ordinary bat that flies around at night,…