1 26 THE NA Ti 'RE-STL T D Y RE VIE IV [i-v-apr., , 9 oS 



We shall start at 2 o'clock, one week from today. Each one is to take 

 along a mason fruit-jar with its cover. 



( )ur object is to find out what animals live there and how they get their 

 food and escape their enemies. Each one must find out these things for 

 himself; do not ask anyone else to tell you nor answer any questions. 

 Each must be a true investigator. 



Plants and Animals Living in [ones Pond 

 A. Annuals that jump into the water when frightened. 



Walk up to the bank of the pond very slowly and carefully in order to get 

 a close look at the frogs as they jump in. 

 Frog. 



How it escapes enemies. 



1. Does it jump in head first or feet first? Is this way quicker 



than the other would be? 



2. Can you see the frog after it touches the bottom when this is 



mud or clay? What does the frog do when he strikes the 

 bottom that hides him from his enemies' eyes? 



3. Watch very quietly to see where the frog comes up to breathe. 



How long did he stay under? Time another frog. 



4. Does he come up at the same place at which he went in? Do 



you think there is any advantage in this habit? 



5. Does he come up where the water is clear or where there are 



plants growing or floating? Does he act as if he were try- 

 ing to hide and yet keep his eves on you? 



6. Can you see the two little holes he breathes through on top of 



his nose 5 Are these breathing holes so placed on his head 

 that he can get air without lifting his head out of the 

 water? What is the advantage in this? 



7. How are his eyes placed? What power does this give him 



that will help him to escape from his enemies" 

 . S. fan the frog go backward into the water when frightened or 

 must he first turn around and then dive? 

 9. Catch a frog if you can and find out whether his skin is 

 slippery? Is it hard to hold him ? Why? 

 10. What peculiarity of his hind feet helps him greatly in swim- 

 ming? Is the same structure found in his front feet ? 

 How it captures food. 



1. Very quietly watch a frog resting on the shore or on some 



floating object to see if you can find how he catches flies or 

 other insects. You will have to be very quiet and patient. 



2. Tie a little rag of red flannel to the end of a string on a pole and 



dangle it in front of a frog slowly, being careful not to 

 frighten him. If he is not frightened he will show you how 

 he tries to capture food. 

 .;. It you can find a frog in the grass you will probably see him 

 catching insects. A toad catches them the same way, and 

 it you hnd one watch it. 



