Genus ACANTHOPNEUSTE

The genus Acanthopneuste, which contains eleven Indian species, differs from Phylloscopus, as already noted, in having a proportionally larger bill and the nostrils overhung by frontal hairs growing from the rictus or gape quite up to the culmen. In other respects the two genera are alike.

The following descriptions of the plumage, as in Phylloscopus, are brief and applicable to the birds after the autumn moult on first arrival in the plains. The differences between the winter and the summer plumages are too trivial to require separate notice. These birds are among the most difficult to identify, and the student will find the points set forth in the key and in the short characters I have given of more service than long elaborate descriptions.

Key to the Species.

a. With no band on crown of head.
a1. Second primary about equal to sixth…………….. A. borealis, p. 412.
b1. Second primary between sixth and eighth.
a2. Upper plumage lively green; lower rather bright yellow…………….. A. nitidus, p. 413.
b2. Upper plumage dull green; lower greyish yellow.
a3. With one wing-bar…………….. A. viridanus, p. 414.
b3. With two wing-bars…………….. A. plumbeitarsus, p. 414.
c2. Upper plumage very dark green; lower greyish yellow…………….. A. magnirostris, p. 415.
d2. Upper plumage tinged with ochraceous; lower with buff…………….. A. tenellipes, p. 416.
c1. Second primary about equal to tenth…………….. A. lugubris, p. 417.
b. With a coronal band.
d1. Inner webs of two outer pairs of tail- feathers brown like remainder of tail.
e2. Lower plumage whitish, contrasting with bright yellow of under tail-coverts . …………….. A. coronatus, p. 417.
f2. Lower plumage uniform pale yellow.
c3. Larger ; wing 2.3 to 2.7 ; tail about 2…………….. A. occipitalis, p. 418.
d3. Smaller; wing 2.1 to 2.3; tail about 1.8…………….. A. trochiloides, p. 419.
e1. Inner webs of two outer pairs of tail-feathers entirely white…………….. A. davisoni, p. 419.

BookTitle: 
The Fauna Of British India including Ceylon and Burma
Reference: 
OATES EW. The Fauna of British India, including Ceylon and Burma. Vol.1 1889.
Title in Book: 
Genus ACANTHOPNEUSTE
Book Author: 
Eugene William Oates, Edited by William Thomas Blanford
Year: 
1889
Page No: 
412
M_ID: 
22938
M_SN: 
Phylloscopus
Volume: 
Vol. 1
Term name: 
id: 
581

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