THE WHISTLING DUCKS.
THE Whistling Ducks comprise a number of species which are confined to the tropical parts of the world. Two of these are found within the limits of the Indian Empire, where they are resident.
In this group the sexes are quite alike in plumage, and they do not differ much in size. The Whistling Ducks have an autumn moult only. They have rather long, but slender legs; the wing is somewhat weak, the outer secondaries reaching considerably beyond the tips of the primary coverts, when the wing is closed ; the bill is of equal width throughout; the plumage is rufous; the primaries, axillaries and under wing-coverts are all black. Consequently the Whistling Ducks can hardly be confounded with any other Indian Duck.
The species of this group nest almost entirely on trees, and they habitually perch, or rather stand on the larger branches of these; their feet are not well adapted for grasping the small branches.
I am quite unable to follow previous writers in terming these birds " Teal." They have no resemblance whatever to the Water Fowl to which the name " Teal " is properly applied.