Lesson 9

Question 1

What are the two types of vision? Describe the benefits and drawbacks of each type

Answer 1

Monocular vision= birds that have eyes o either side of their head; large field of vision but poor depth perception; they can use each eye for different tasks Binocular vision- birds that have both eyes at the from of head; gives them smaller field of vision but greater depth perception

Question 2

How many different types of cones do birds’ eyes have/ What do they detect?

Answer 2

4 types of cones detect reds, greens, blues, and ultraviolet rays.

Question 3

What kind of birds need dense auricular feathers?

Answer 3

Aquatic birds to protect their ears form water.

Question 4

In what type of bird is the sense of smell best developed? Give examples.

Answer 4

Seabirds have best sense of smell. Tubenoses detect food in water. Stop petrels can detect krill from 15 miles away.