lie; 
a broad blackish patch or crescent upon 
the back of the neck ; scapulars and wings 
of a deep bluish ash-colour, terminated 
by dusky brown ; the bending and upper 
edges of the wings black ; large dusky 
spots upon the scapulars and secondaries ; 
quills black; tail black towards the end, 
with whitish tip; exterior tail feather 
white; irides, and circle round the eyes 
black 
After the first moulting , the back as- 
sumes a bluish ash-colour, but often mixed 
with some feathers spotted with brown ; 
the black spots in front and behind the 
eyes, as well as the dusky feathers about 
the ears and back of the neck, become of 
a deep bluish ash-colour; there are still 
black and brown spots upon the wings ; 
the tail has some black towards the end ; 
the beak is of a greenish yellow, with 
dusky spots ; all the under parts and fore- 
head of a pure white. 
After the moulting of the second autumn, 
the winter plumage is perfect. In one or 
other of these liveries it is the X. Tri- 
