This Subfamily contains the true Pheasants and the game-birds most closely connected with them. The moult of the tail-feathers commences with the outermost pair. With the exception of this character it is not easy to differentiate between the Pheasants and the Partridges as groups, though the typical forms are so well marked. Taking them as a whole the Pheasants are big birds with a wing of over 8 inches and the tail is longer than the wing in all genera except Lophophorus and Lophura. The Perdicinae, or Partridges, on the other hand, are all smaller birds with a wing under 8 inches, except Ithaginis, Tetraogallus and Tragopan.

Of the Phasianinae the two exceptions, Lophophorus and Lophura are both big birds with crests and with a wing of over 11 inches, a combination found in no Perdicinae. In the latter group the exceptions Ithaginis and Tetraogallus have the wing very much longer than the tail, whilst the birds of the genus Tragopan can always be distinguished by the possession of peculiar fleshy horns and wattles.

Key to Genera.
A.A fleshy erect comb on the crown of the male............... GALLUS, p. 294.
B.No fleshy comb on the crown of the male; no ear-tufts.
a. Tail longer than wing in both sexes, much longer in males and much graduated.
a1. No occipital crest; first primary longer than tenth.
a1. Feathers of rump rounded; bare skin of face not forming wattles......................SYRMATICUS, p. 302.
b2, Feathers of rump lanceolate ; bare skin of face developed into wattles………..PHASIANUS, p. 305.
b1. An occipital crest; first primary shorter than tenth.
c2. No cape of erectile feathers over nape………….CATREUS, p. 307.
d2. A cape of erectile feathers covering-nape and shoulders………..CHRYSOLOPHUS, p. 314.
B.Tail slightly longer than wing in males, subequal or shorter in females; graduated.
c1. Sides of head feathered...............PUCRASIA, p. 309.
d1. Sides of head naked.
e2. Crest an erect brush-like tuft of feathers; rump of male fiery-red......LOPHURA, p. 316.
f2. Crest of long recumbent feathers; no red on rump.............GENNAEUS, p. 319.
c.Tail rounded, not longer than wing in either sex .............LOPHOPHORUS, p. 334.
C. No comb or crest, but well-developed ear tufts...............CROSSOPTILON, p. 339.

The Fauna Of British India, Including Ceylon And Burma-birds(second Edition)
Baker, EC S (1922–1930) The fauna of British India, including Ceylon and Burma. Second edition. vol.5 1928.
Title in Book: 
Book Author: 
Edward Charles Stuart Baker
Page No: 
Vol. 5

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith