Genus LARUS

Genus LARUS.

Larus Linn., Syst. Nat., 10th ed., i, p. 136 (Jan. 1758).

Type by sub-desig., Larus marinus Linn. (Selby, Oat. Gen, & Subgen. Birds, p. 48, 1840).

In this genus the bill is stout, compressed and of moderate length, with the upper mandible longer than the lower, curved and bent down over the tip ; nostrils oblong and placed some distance from the base ; tarsus moderate or rather short and scutellated in front; anterior toes long and fully webbed, hind toe small; the wings are long, exceeding the tail when closed.

Key to Species.

A. Upper mandible longer than the lower.
a. A black or brown head in Summer, traces of which usually remain in Winter.
a1. Mantle pale grey in adults.
a2. Wing over 450 mm…………L. ichthyaetus, p. 101.
b2. Wing under 350 mm. a3. First primary white with black edges and tip…………L. ridibundus, p. 102.
b3. First primary black with a white subterminal band…………L. brunnicephalus, p. 103.
b1. Mantle dark brownish at all stages…………L. hemprichii, p. 104.
b. No black or brown head ; mantle grey.
c1. Wing under 320 mm.; bill and legs-red…………L. genei, p. 106.
d1. Wing over 325 mm.; bill and legs yellowish.
c2. Mantle dark slaty-grey…………L. fuscus, p. 107.
d2. Mantle pale bluish-grey…………L. argentatus, p. 108.

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 LARUS
Book Author: 
Edward Charles Stuart Baker
Year: 
1929
Page No: 
100
M_ID: 
4510
M_SN: 
Ichthyaetus
Volume: 
Vol. 6
Term name: 
id: 
4888

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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