Man has always dreamed of being able to fly, and down the years many people have sought ways of doing so. Yet it was not until the 20th century that they finally succeeded. Flying machines with advanced technology emerged at the end of long years of research and experiment. However, the techniques employed by man are really very primitive compared to the flight machines in nature. Nature's flight machines are birds -- the jewels of the sky. They can fly at great heights, or skim over the ground, at great speeds or very slowly, but the techniques they employ are always magnificent. In this film, we shall be considering birds and their fascinating characteristics, each of which is a marvel of creation. THE MIRACLE IN BIRDS The Miracle of Flight Pigeons are the birds we probably come across most in our daily lives. These tiny creatures may not attract many peoples' attention, but when we examine them closely they are a miracle of creation. In order to see the truth of this, let us consider how a pigeon takes off from the ground, and witness a flawless piece of engineering design. First of all, the pigeon jumps up in the air. It then raises its wings at the moment its feet leave the ground, and pushes the air behind it with all its strength. It then leans slightly forward. It has now risen high in enough in the air to be able to move forward. Larger birds than pigeons cannot perform this difficult movement more than twice. Really large birds, such as the albatross, cannot do ...
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