Ghee UUe Ul Bie NRE USE eat aN |7 
peaty remains of the ancient marshes below into the bed rock. Year 
after year now our artesian wells must sink deeper to draw from this 
ebbing supply that is no longer sufficiently renewed. 
But, where it still remains, the marsh remains wild, its creatures 
adhering to its borders with the faithfulness of long habit. It is a 
friendly marsh that readily gives up its secrets to those who wish to 
know; and to those who know, a marsh can be a wonder world. 
Photograph by A. M. Bailey. 
The King Rail, a Marsh-nesting Species. 
Population Studies in Chicago Birds 
By RUDYERD BOULTON 
Modern studies in conservation, game protective measures and 
the like have emphasized the need of accurate data on the numbers of 
individuals of birds and animals that can efficiently occupy a given 
area. It has become more and more apparent that no community 
possesses adequate information,—and Chicago is no exception. The 
changes that have been wrought in our region through urbanization 
and modern development have had, as every one knows, a profound 
influence on animal life. What influence will the developments that 
are now underway have in the future? 
