361 Recently published Ornithological Works. 
more struck by the exceptional beauty of the plates and the 
thorough treatment of the habits of the species. How 
thorough this is may be judged from the fact that the letter- 
press deals with but four species and that the Whitethroat 
alone occupies twenty-three pages, the Lesser Whitethroat 
twenty. Of the Siberian Chiffchaff ( Phylloscopus tristis) and 
the Greenish Willow-Warbler (P. viridanus), which do not 
breed in Britain, only the description and distribution are 
given, in accordance with the scheme of the work. Among 
the many points of interest may be mentioned the account 
of the difference in the songs of various species in different 
localities, the behaviour of the Lesser Whitethroat when its 
young are in danger, and several curious habits of the 
Common Whitethroat, such as the building of extra and 
useless nests, the habit of removing or even swallowing 
small leaves dropped into the structure, and so forth ; but it 
will be evident that these do not represent a tithe of the total 
information. Coloured plates are given of all the species, 
and plain plates in the case of the two first-named, to exhibit 
particular attitudes ; but the plate of eggs which is the 
frontispiece to this Part is perhaps most striking of all, and 
gives figures of a well chosen series with admirable fidelity. 
37. Migration-Report of the B. 0. C. 
[Report on the Immigrations of Summer Residents in the Spring of 1908; 
also Notes on the migratory movements and Records received from 
light-houses and light-vessels during the autumn of 1907. By the 
Committee appointed hy the British Ornithologists’ Club. Bull. B. 0. C. 
vol. xxiv. Nov. 1909; 235 pp.] 
The third Report of the Committee of the B. O. C. on 
Migration has increased in size to a volume of 235 pages. 
Besides the ordinary reports on the scheduled species in the 
Spring of 1908, each of which is illustrated by a map, notes 
are given on the migratory movements observed during the 
previous autumn. Some of these are of considerable in¬ 
terest, for example those of the Blackbird ( Turdus merula) ) 
which is usually considered a very stay-at-home species. 
