1915] The Ottawa Naturalist. 17 



Which individuals come or leave first, male or female, young 

 or old? 



Are they mated when they arrive or do thev select mates 

 after arrival? 



Are there any courtship ceremonies? 



What characters seem to determine sexual selection? 

 Vigor? Beauty? Song? 



Do the same individuals return year after year to the same 

 localities, and do they mate together annually? 



How wide is the local range of the individual, do they keep 

 close to this home area or wander widely? 



When, where and how do they nest? 



Which sex choses the site? 



Which sex builds the nest and how much and in what way 

 do they aid each other? 



What seems to be the qualities that they look for in selecting 

 a nesting site ? 



Do they work on the construction throughout the day or 

 only at regular intervals? 



What is the technic of nest building? 



Is the technic the result of instinct, experience or memory 

 and does it improve with experience. 



Are all individuals of the species equally expert in nest 

 building ? 



How far can they adjust nest to new materials, situations 

 or conditions? 



Is there any change in the routine habits before, during or 

 after nest building ? 



Are the eggs deposited immediately after the nest is'^finished? 



What is the incubation period? 



How many eggs are laid and when, how often, what is a 

 normal set? 



Does the egg laying seem under the conscious control of the 

 individual ? 



What determines the number of eggs, — the size of the nest, 

 the judgment, age or vigor of individual? 



How are the eggs brooded, by which sex, do they divide 

 the labor? Are the feathers removed from the abdomen of the 

 brooding bird consciously or do they wear ofif by friction with 

 the eggs? What is the incubation temperature? How often 

 are the'eggs tvirne'd by the parent? 



