Читать книгу A Guide for the Study of Animals - Worrallo Whitney - Страница 36

1 Give the general color of your specimen and explain how this color may make it conspicuous or may aid its concealment.

2  Describe the outer surface or covering of the caterpillar. What structures, if any, are there, which might make the animal distasteful or inedible?

3 How many pairs of legs are there? How are they distributed along the body? Counting the segments, state which ones bear no legs.

4 To what extent do the legs act in locomotion? Are they mere organs for attachment while the body swings forward and backward, or do the legs do this, as in a horse? Make a complete statement.

5 Notice the openings of the internal breathing tubes. How are they protected against dust and other foreign matter?

6 Does the caterpillar seem to be a warm-blooded animal? State how the free access of air along the body would influence internal temperature.

7 What do you know about a caterpillar's appetite? How might caterpillars be beneficial or harmful? What means has nature of holding their numbers in check?

8 Recalling that caterpillars finally "sleep" for several days or weeks and awaken as winged creatures, how can you account for their appetites?