Subfamily SIBIINAE

The subfamily Sibiinae is represented in India by thirty-two species of birds. These all agree in being strictly arboreal, in having the sexes alike in plumage and size, and in being non-migratory. Their plumage is in most cases bright, and they are more or less found in flocks.

With few exceptions the Sibiinae lay spotted eggs. The few exceptions require further evidence, as the information on the subject of their nidification is either insufficient or conflicting. The species of Zosterops lay eggs which are sometimes plain and sometimes marked, and the position of this genus requires more investigation. As remarked in another place, Zosterops is included in this subfamily provisionally, as no better place can at present be found for it. It, however, agrees in all essential characters with the Sibiinae.

Key to the Genera.

a. Tail nearly twice the Length of wing……………..SIBIA, p. 195.
b. Tail and wing not very different in Length.
a1. Tail graduated.
a2. All the feathers of the tail graduated.
a3. Tail longer than wing, the outer tail-feather falling short of tip of tail by a distance equal to Length of tarsus.
a4. Depth of bill at the nostrils less than breadth; wings not barred……………..LIOPTILA, 195.
b. Depth of bill at the nostrils greater than breadth ; wings barred……………..ACTINODURA, p. 201.
b3. Tail equal to or shorter than wing; the outer tail-feather falling short of tip of tail by a distance less than Length of tarsus.
c4. Nostrils not overhung by hairs; wings barred……………..Ixops, p. 203.
d4. Nostrils overhung by hairs; wings not barred……………..STAPHIDIA, p. 205.
b2. The four middle pairs of tail-feathers of the same Length; the two outer pairs only
graduated……………..SIVA, p. 207.
b1. Tail square, not graduated.
c2. Bill slender, gently curved, both mandibles of the same Length.
c3. First primary equal in Length to the tarsus……………..YUHINA, p. 211.
d3. First primary extremely minute, not longer than the hind toe……………..ZOSTEROPS, p. 213.
d2. Hill stout, straight, the upper mandible longer than the lower one, with the tip bent down.
e3. Depth of bill at the nostrils less than breadth……………..IXULUS, p. 210,
f3. Depth of bill at the nostrils more than breadth……………..HERPORNIS, p. 210

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: 
Subfamily SIBIINAE
Book Author: 
Eugene William Oates, Edited by William Thomas Blanford
Year: 
1889
Page No: 
194
Volume: 
Vol. 1
id: 
278

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