THE METHODS OF THE BIRD PHOTOGRAPHER 97 
surroundings, are of interest in connection with the 
biographies of many birds. 
Seasons.—The camera permits us to make so ex- 
act a record of the rise and fall of the year, as it is 
registered by vegeta- 
tion, that we can actu- 
ally compare existing 
conditions with those 
which prevailed at any 
previous time. Com- 
pare, for example, the 
series of four pic- 
tures*" here presented, 
all made from the same &, Sonia 
point of view, in order 
to appreciate how graphically seasonal changes may 
be shown by the camera. In this instance, photog- 
raphy is of more service to the botanist than to the 
ornithologist ; but every student of migration knows 
how closely related are 
the appearance of cer- 
tain birds and flow- 
ers, and will readily 
appreciate, therefore, 
the value of a series 
of photographs of sev- 
eral different subjects, 
taken at short inter- 
vals, and showing the 
changes in vegetation due to the approach of sum- 
mer or winter. In connection with such related 
phenomena as temperature, rainfall, and weather, 
these pictures form as accurate a record of the sea- 
9. Summer. 
