Richardson’s skua. 
underlying spots are small and indistinct, 
inches j diam., 1-85-1 75. 
Axis, 2 - 25 - 2 - 
n. Richardson’s skua, stercorarius crepidatus. 
Larus crepidatus Banks, in Cook’s Voy. Hawksworth’s ed. ii. 
r ,R’ ^ 5 '^ 773 /- 
I^estrts richardson^^m^.; Macgill. Brit. B. v. p. 492 (1852) • 
L.lford, Col. Fig. Brit. B. part xxxi. (1896). 
Stereo, anus crepidatus. Dresser, B. Piur. viii. p. 471 pig 
(1876); B. O. U. List Brit B ^p’ 
('883); Saunders, ed, Yarrell’s Brit B. iii. p 674 • 
Id. Man. Brit B. p. 675 (1889). ^ ’ 
Stercoraraa richardsoni, Seebohm, Hist. Brit. B. iii. p. 353 
(Plate cm.) 
Adult Male_ (Pale Form).— General colour above dark slatv 
bastard-wing, primary- 
Shf ashv yellowish-white shaft^ 
at" the ‘'1 little white 
the ^nd of °the° f ^ blacker towards 
Hie end of the feathers, the two centre feathers much 
with“f1^’ crown of head darker slaty-brown, forming a cap 
with a line of white at the base of the forehead: lores and 
straw-yellow rthe" hiTneck^and"upp^ mantle lighrashy^ 
distinct on the sides of the breast and sides of body and 
again darker on the under tail-coverts, with white shafts and 
aark sJaty-broiin , bill horn-colour; tarsi bluish in life 
a^T/cht" cX; Total lengS 
feathers, 7-85; tars"us,\7V. 
incX* w“r8'“"'^'- Total length, 19-3 
^5 
