BIRDS 107 



Often the cocoon is empty. You can tell, by "hefting" the 

 cocoon, whether there is a pupa inside or not. If there is, 

 cut open the cocoon, beginning at the open end. Use slender, 

 sharp scissors, and be very careful not to injure the creature 

 inside. Touch the pupa; result? Sketch it. 



When you are through examining the pupa, see that it is placed 

 as it was when you opened the cocoon, and close the slit with a 

 strip of gummed paper; then lay the cocoon in the net covered 

 box. Leave the box where it will be warm, and where the sun- 

 light will shine on the cocoon. You may be rewarded, in the 

 spring, by the appearance of the beautiful imago, the adult moth. 



e. Look for some ants; you will usually find them on side- 

 walks or along the road. Follow them, and find out where they 

 live. Carefully open up their "house," and see the galleries 

 they have formed. Tell what they do when disturbed. 



EXERCISE 98 

 BIRDS 



Materials. Skeleton of bird, live chicken, foot and leg bones of a 

 duck, leg bones and wing bones of a chicken and a turkey, feathers of 

 a chicken, duck, pigeon, goose, and turkey; a chicken gizzard. 



a. Read 344 of text. If the school has the skeleton of a bird, 

 study it carefully, and compare its bones with those of Fig. 269. 



6. Examine the foot of a domestic fowl ("chicken"), noting 

 the scales. How many toes has the chicken's foot. How many 

 are directed forward? How many backward? Is the chicken 

 a perching or a climbing bird? Find the end of the white 

 tendon that is connected with the chicken's toes, and pull it. 

 What happens? 



If possible, examine the foot of a duck. How does it differ 

 from that of a chicken? Has this difference anything to do 

 with the habits of the two birds? 



