333 
1921 .] Recently published Ornithological Works. 
Skovgaard on Danish Birds. 
[Den Sorte Stork, saerlig i Denmark, i tekst og billeder af P. 
Skovgaard. Pp. 1-56 ; many photographs. Yiborg (Backhausens), 
1920. 8vo.] 
[Danske-Fugle: Organ for Dansk Ornithologisk Central ved P. 
Skovgaard. Yiborg. Aarg. 1, no. 1, 1920.] 
The first of these publications contains an account of the 
life-history of the Black Stork (Ciconia nigra') in Denmark. 
There is a map showing the breeding-stations, from which 
it appears that it is most abundant in the eastern half of 
Jutland, less so in the islands, and is hardly found at all in 
the western half of the peninsula. It arrives at its breeding- 
places generally in April, though occasionally in March, 
and leaves as a rule in August or early September. The 
paper is illustrated with a number of very fine photographs, 
all taken by the author himself. 
The second publication is a new magazine devoted 
to Danish Birds, though the whole of the articles are 
apparently from the pen of Mr. Skovgaard. One of 
these deals with the food of the White Stork as deduced 
from an examination of the stomach. Another has an 
account of Mr. Skovgaard's activities in bird-ringing, and 
there is also a list of a collection of Danish birds belonging 
to Mr. C. Beimers of Yiborg, with a map and some photo¬ 
graphs of the rarer species. 
We congratulate Mr. Skovgaard on his industry and 
hope that he will be able to continue his studies, and that 
his magazine will have a long life. 
Stresemann on the races of Long-tailed Tits and Bullfinches. 
[Uber die Formen der Grrnppe Wfithalos cciudatus und ihre Kreuzungen. 
fiber die europaischen Gimpel (mit einer Kart ilirer Yerbreitung). 
Von Erwin Stresemann. Beitrage zur Zoogeographie der palaarktischen 
Region. Herausgegeben von der Ornith. Gesellsch. in Bayern. Heft 1, 
1919, pp. 1-56. J 
In the first of these essays Dr. Stresemann reviews the 
very variable group of the Long-tailed Tits, among which 
