40 THE TAU D UB ON | BCU sD saree 

skins representing all of the orders of local importance and all of the 
common families of perching birds. The different external characters 
which are used in identification are characters which are adaptations 
to the environment, so that important biological principles are stressed 
in such a way as to make permanent impressions. An excellent aid in 
class work in connection with bird study is the stereopticon lantern. 
Slides made from photographs of the living birds are available, which 
offer studies in color, habits and habitats of birds which aid in preparing 
for the field work. Other slides which show diagrams giving a graphic 
representation of economic importance of the different species help in 
fixing the importance of this relation. 
Most of the success or failure of bird anes in the high school classes 
depends upon the teacher. He must develop an enthusiasm for the 
work that is contagious. He must realize the social importance of the 
information and training that bird study gives and attack the prob- 
lem as a civic duty. The conservation of our wild bird life is a national, 
state and community problem and must depend upon each citizen 
knowing the different species and actually doing his part. 

Photo by Auguste Matthieu 
Brown THRASHER 
