Recently published Ornithological Works. ^77 



tliat these two are never of the same age or length, and 

 concludes that they are developed alternately instead of 

 synchronously. He believes that each feather remains in 

 position for two years, and that only one feather is moulted 

 each year, so that the central tail-foathers are never equally 

 developed at any one time. So far as we are aware this 

 curious anomaly has never been commented on previously. 



Bird-Lore. 



[Bird-Lore. An iUustrated bi-monthly magazine devoted to the 

 study and protection of birds. Edited by Frank M. Chapman. 

 Yol.'xiv. for 1914.] 



This is a magazine which has no exact counterpart in 

 England. Perhaps it may be likened to a combination of 

 * British Birds ' and the Journal of the Royal Society for 

 the Protection of Birds. It deals to a large extent, though 

 not exclusivel}', with the life-history of North American 

 birds and is copiously illustrated with the results of 

 American bird-lovers' cameras. It is also in addition 

 the official organ of the Audubon Societies, a very powerful 

 and widespread organization with branches in every State, 

 as well as a strong and wealthy central controlling body, 

 whose object is the protection and conservation of bird-life 

 throughout the United States. 



Thus much as an introduction to the present volume, as 

 it appears to have very little circulation on this side of tlie 

 Atlantic, and last year the writer of this notice had the very 

 greatest difficulty in borrowing a complete set of the volume 

 for 1913. 



As to the contents of the present volume, perhaps the 

 most original and useful paper is one on the voices and 

 habits of neotropical l)irds by Mr, Louis Agassiz Fuertes, 

 the well-known bird artist, who has accompanied many of 

 the recent expeditions to Colombia and elsewhere in tropical 

 America, and has had great opportunities for studying this 

 little-known subject. There are four papers scattered 

 through the present volume illustrated by drawings from 

 the author's pencil, and containing most vivid descriptions 

 of bird-life and bird-music in the tropical forest, 



SKB. X, — VOL. HI, 2 c 



