Genus NYROCA

Genus NYROCA.

Nyroca Fleming, Philos. Zool., ii, p. 260 (1822).

Type by orig. desig., Anas rufa Linn.

In Nyroca the lamellae of the bill are short, set much further apart than in Netta and less prominent.

The bill is of moderate length, rather more raised at the base than in Netta and either equally broad throughout its length or slightly broader at the tip ; the line of the culmen is concave and the feather-line at the base of the bill convex ; the nostril is as in Netta; the characters of the feet, wings and tail as in that genus.

The genus is cosmopolitan and four species occur within our limits.

Key to Species.

A. Sides of bill parallel throughout their length.
a. Back and scapulars distinctly barred or vermiculated ………… N. ferina, p. 450.
b. Back and scapulars merely speckled ………… N. rufa, p. 452.
c. Upper back and head rufous-brown; scapulars slightly vermiculated; no white speculum………… N. ferina, p. 450.
d. No vermiculations on upper plumage; a white speculum………… N. rufa, p. 452.
B. Bill wider at the tip than at the base.
e. Head never crested; hack and scapulars in adults not black………… N. marila, p. 456.
f. Head always more or less crested; scapulars in adult black, more or less sprinkled with
whitish………… N. fuligula, p. 458.

BookTitle: 
The Fauna Of British India, Including Ceylon And Burma-birds(second Edition)
Reference: 
Baker, EC S (1922–1930) The fauna of British India, including Ceylon and Burma. Second edition. vol.6 1929.
Title in Book: 
Genus NYROCA
Book Author: 
Edward Charles Stuart Baker
Year: 
1929
Page No: 
450
M_ID: 
507
M_SN: 
Aythya
Volume: 
Vol. 6
Term name: 
id: 
5290

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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