Mr. Jenyns on the Ornithology of Cambridgeshire. 301 
Sp. 52. M. flava, Temm. Man. d’Ornith. p. 260. 
YeLLtow WacraiL. — This species visits us in the spring and 
departs in the autumn. It does not appear to be uncommon in 
many parts of the county, though much more so than the Motacilla 
alba. I have occasionally seen them in considerable plenty upon 
the arable lands bordering on Bottisham and Swaffham fens, and 
likewise in the low meadows about Quy Water. 
Genus XV. ANTHUS. Bechst. 
Sp.53. A. pratensis, Temm. Man. d’Ornith. p. 269. 
Trr-preit.— Equally abundant on the low and fenny as well as 
on the high and heathy parts of the county, in which situations 
it is to be found all the year. In the autumn it appears to be 
subject to a considerable change of plumage, from which cireum- 
stance some authors have erroneously made two species of this 
bird. 
Sp.54. A. arboreus, Temm. Man. d’Ornith. p.271. 
TREE-PIPIT.—This species very strongly resembles the last in 
plumage, but may always be distinguished by the curvature of the 
hind claw, and the greater dilatation of the bill towards its base. 
In its haunts it is widely different, being entirely confined to woods 
and plantations of tall trees, and never frequenting the open parts 
of the country; nor does it remain with us through the winter, 
but makes its first appearance about the third week in April, and 
departs at the approach of autumn. Its song, which is delivered 
on wing in its descent, is heard till the middle of July. 
——~+>—_ — 
ORDER IV. Granivort. 
Genus XVI. ALAUDA. Linn. 
Sp.55. A. arvensis, Temm. Man. d’Ornith. p. 281. 
Sky-Lark.—These birds get together in small companies at the 
approach of winter, but the flocks are not considerable except in 
very severe weather. 
QQ2 
