106 Practical Zoology. 



young able to get their own food as soon as they are hatched, or 

 are they helpless ? How fully feathered are they when hatched,, 

 and are the feathers the same in color and texture as in the 

 parents ? Which do they more nearly resemble, the adult male, or 

 the female ? On what are the young fed ? Is food ever especially 

 prepared for the young? Do both parents bring food? Do the 

 young require much or little food? Are their eyes opened as soon 

 as they are hatched? How long till they leave the nest? Till 

 they can fly ? Are they cared for after they leave the nest ? Is 

 the nest a " home " ? Do the young return to the same spot ? Do 

 they ever occupy an old nest? Do they use any of the material 

 of an old nest ? 



Migration. Make a list of the birds that you see remaining 

 here during the summer. Make another list of those that stay 

 with us during the winter. Why do some of these birds go south 

 in winter while others remain the year round ? Is the blue jay 

 any more warmly clad than the robin? Or is there some other 

 reason than mere ability to "stand the cold" that leads one to 

 stay while the other migrates? Do you see birds in the fall and 

 spring that are not seen here either in winter or summer? How 

 do you account for these facts? Make a list of birds that are 

 seen only during fall and spring. Do birds migrate singly or in 

 flocks? Or in pairs? Do you see in winter any birds that are 

 not here in the summer? 



Songs. How many objects have birds in using the voice? 

 How many distinct kinds of calls has this bird? Can this bird 

 be said to sing? Do birds have a language? 



Care of Feathers. How do birds arrange their feathers and 

 keep them in good condition? 



Molting. When do birds appear brightest and freshest? What 

 makes the difference? Are all birds alike in these changes? 

 Examine birds to find evidence of change. 



Senses. Can birds see well? Hear well? Experiment to 

 test their senses. 





