20 Farmers' Bulletin 1327. 



Occasionally birds in confinement " go light," or waste away until 

 they are far below their normal standard of plumpness, without 

 marked symptoms of disease. In such cases change the seed supply, 

 making sure that the seed is fresh and wholesome, and vary the 

 diet with green foods, and with bread softened with milk. It is 

 also beneficial to change the location of the cage ; if possible, place the 

 cage where it will receive the sun for a few hours each day, except 

 in the heat of midsummer. Make sure that the canary is not in- 

 fested with mites. 



When worms are present, as sometimes happens, small fragments 

 of these internal parasites may be seen in the droppings when the 

 cage is cleaned. As a remedy, place in the drinking cup 8 or 10 

 drops of tincture of gentian in an ounce of water. This may be 

 given for two days, and, in addition, two drops of olive oil may 

 be administered in the bill by means of a medicine dropper. 



For more serious complaints than those enumerated it will be well, 

 if possible, for the amateur to seek the advice of some person, with 

 experience in handling cage birds. 



BIBLIOGRAPHY. 



For the benefit of those who may wish further information on 

 the care of canaries a short list of standard works on the subject is 

 appended. (None of these is available for free distribution by the 

 United States Department of Agriculture.) 4 



BOOKS. 

 Battye, H. W. 



Yorkshire Canaries, How to Breed, Manage, and Exhibit. 80 pp., ill. F. 

 Carl, 154 Fleet St., London, E. C. 



BOALEE, G. H. 



Seeds, Foods, and Wild Plants for Cage Birds. 97 pp., ill. F. Carl, 154 

 Fleet St., London, E. C. 

 Brunskill, E. 



Canary Culture for Amateurs. F. Carl, 154 Fleet St., London, E. C. 

 Church, T. A. 



The Roller; Concerning Its Health, Habits, Feeding, etc. 223 pp., ill. 

 Stuyvesant Press, New York, N. Y. ' 

 Crandaix, L. S. 



Pets ; Their History and Care. 111. H. Holt & Co., New York, N. Y. 



Pets and How to Care for Them. 111. Pub. by New York Zoological Park, 

 New York, N. Y. 

 Creswell, W. G. 



The Hygiene of Bird Keeping. F. Carl, 154 Fleet St., London, E. C. 

 House, C. A. 



Canary Manual. 130 pp., ill. F. Carl, 154 Fleet St., London, E. C 



Norwich Canaries. 48 pp., ill. F. Carl, 154 Fleet St., London, E. C. 

 Lewer, S. H. 



Canaries, Hybrids, and British Birds in Cage and Aviary. 424 pp., 26 pis. 

 (color), and other ills. Waverly Book Co., 7 and 8 Old Bailey, Lon- 

 don, E. C. 

 Norman, H. 



Aviaries, Bird Rooms, and Cages. F. Carl, 154 Fleet St., London, E. C. 



4 Addresses of dealers in cage birds and cage-bird supplies may be obtained on applica- 

 tion to the Biological Survey, TJ. S. Department of Agriculture. 



