Answer the following questions.
1. Write two ways in which feathers help a bird.
2. How do birds communicate?
3. Why do birds migrate?
4. What are migratory birds?
Answers
Answer:
(1) Protect From Wind, Moisture, and Sun
The strong and ridged contour feathers shield birds from wind. The tough material they are made from, beta-keratin, is water and wear resistant. Darker-colored feathers might also provide protection from the sun. Feathers also work to keep water out, keeping birds dry in the rain.
(2) The song of birds can be soothing and inspiring, but birds sing for more than just the beauty of it. Birds use song, call notes and behavior to communicate with each other. Birds use sound and action to scare off predators or warn other birds about danger, to attract a mate or to defend one's territory.
(3) Migratory birds fly hundreds and thousands of kilometres to find the best ecological conditions and habitats for feeding, breeding and raising their young. When conditions at breeding sites become unfavourable, it is time to fly to regions where conditions are better. There are many different migration patterns.
(4) Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans, and is driven primarily by availability of food.
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