40 OUR NATIVE RIRDS 
The so-called ox-bows, or old river channel, are the 
favorite waters of the wood duck. 
Concluding Rémarks.—I hope that my readers, 
especially our boys and girls, will experiment with 
nesting boxes for birds, so that we soon may have 
more definite knowledge on the subject. The pleasure 
derived from such work is a rich reward for it. 
Every bird lover should make good use of his experi- 
ences. Some birds, like our purple martin and the 
European starling, have become accustomed to use 
nesting boxes, but most of our native birds have yet to 
learn to live in the “white man’s houses.” We must, 
therefore, not lose patience if our boxes are not at once 
occupied, but must continue to observe and experiment. 
Magazines like Bird Lore, The Auk, and others will 
be glad to publish the experience of bird lovers. I 
have consulted the following publications and refer my 
readers to them : — 
1. Masefield, Wild Bird Protection and Nesting Boxes, Taylor 
Bros., Leeds, England. 
2. Liebe, Nistkisten fiir Vogel. Theo. Hoffmann, Gera, Germany, 
One of the best treatises on the subject. 
3. Kobelt, Schutz den Vogeln. Bechtold & Co., Wiesbaden, Ger- 
many. 
4. Voigt, Unsere niitzlichen Gartenvogel. Theo. Voigt, Gernrode 
am Harz, Germany. 
. L. H. Bailey, The Birds and I. College of Agriculture, Cornell 
University, Ithaca, N. Y. 
On 
The first costs about 50c., the other three are pamph- 
lets which can be had for about 15c. each. No. 5 is 
