1. Answer these questions, 1. What are the special features of aquatic birds? 2. Why are the bones of flying birds hollow? 3. Why can an ostrich not fly? 4. Why do birds make nests? 5. How does a tailor bird make its nest? a -
Answers
Answer:
Explanation:
Q1- They possess long, webbed feet which helps them in swimming. Since aquatic birds lack fins, webbed feet help in both forward and backward swimming. Moreover, they possess streamlined bodies and dry feathers which help them in flying and keeping them warm in colder water.
Q2- Hollow bones are also called pneumatized bones, meaning they're filled with space for air. It is thought that this structure helps with oxygen intake during flight. Air sacs are attached to the hollow areas in a bird's bones. Essentially, their lungs extend throughout their bones.
Q3- Their flat breastbones lack the keel that anchors the strong pectoral muscles required for flight. Their puny wings can't possibly lift their heavy bodies off the ground.
Q4- They provide a safe, warm place for the parent birds to care for their eggs and chicks, hidden from predators and protected from bad weather. Different birds make their nests using different materials.
Q5- The most intriguing quirk of the common tailorbird (Orthotomus sutorius) is perhaps that it creates its nest by sewing leaves together with its beak.