238 



FIRST LESSONS IN ZOOLOO' 



you to examine them at your leisure, but many of them 

 will, and in following the others you \\ill have all the 

 excitement of the chase. Who knows what rare species 

 the stranger may prove to be ! 



" From )'our description, and what added notes on 

 voice and actions you ma}' obtain, the field-key and illus- 



FlG. 195. — Puffins. (After plmtograph from life liy C. Kr-arton.) 



trations on the succeeding pages should make identifica- 

 tion a simple matter." 



Birds and the seasons. — In tr}-ing to become ac- 

 quainted with the birds of a localit}' it must be borne in 

 mind that the bird-fauna of any region varies with the 

 season. Some birds live in it all the }'ear through; these 

 arc called residents. Some spend onl)- the summer or 

 breeding season in the locality, coming up from the 

 South in spring and fl}'ing back in autumn; these are 

 summer residents. Some spend onh- the ^\•inter in the 

 locality, coming down from the se\'e)cr North at the 

 beginning of winter, and going back with the coming of 

 spring ; these are -winter residents. Some are to be found 

 in the locality only in spring and autumn, as tlie}' are 

 migrating north and south betM'een their tropical ^\■inter 

 quarters and their nortliern summer or breeding home ; 

 these are migrants. And, finalh', an occasional repre- 

 sentative of certain bird species, «hosc normal range 

 docs not include tlie given localit)- at all, \\-ill appear now 



