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Many birds migrate in flocks. For larger birds, it is assumed that flying in flocks reduces energy costs. The V formation is often supposed to boost the efficiency and range of flying birds, particularly over long migratory routes. All the birds except the first fly in the upwash from one of the wingtip vortices of the bird ahead.
Bird migration is controlled primarily by day length, signalled by hormonal changes in the bird's body. [19] On migration, birds navigate using multiple senses. Many birds use a sun compass, requiring them to compensate for the sun's changing position with time of day. [20] Navigation involves the ability to detect magnetic fields. [21]
Measurements of bird flocking have been made [3] using high-speed cameras, and a computer analysis has been made to test the simple rules of flocking mentioned below. It is found that they generally hold true in the case of bird flocking, but the long range attraction rule (cohesion) applies to the nearest 5–10 neighbors of the flocking bird and is independent of the distance of these ...
Human uses of birds have, for thousands of years, included both economic uses such as food, and symbolic uses such as art, music, and religion. In terms of economic uses, birds have been hunted for food since Palaeolithic times. They have been captured and bred as poultry to provide meat and eggs since at least the time of ancient Egypt.
Providing birds with a safe and warm space is just as vital as extra food at this time of year. "Robins often use nest boxes as roosting sites during the winter, so putting up a suitable nest box ...
On his YouTube channel, Apollo has been shown asking several questions and understanding the answers he receives. [8] This makes him the second recorded non-human animal to have ever asked a question, the first being Alex, another African Grey Parrot. Apes who have been trained to use sign language have so far failed to ever ask a single question.
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The salmon-crested cockatoo (Cacatua moluccensis), also known as the Moluccan cockatoo, is a cockatoo endemic to the Seram archipelago in eastern Indonesia. At a height of up to 46–52 cm (1.51–1.71 ft) and weight of up to 850 g (1.87 lb), it is among the largest of the white cockatoos .