Order PASSERIFORMES. 
No. 447. 
Family MUSCICAPIDAQ. 
ETHELORNIS TENEBROSUS. 
DUSKY FLYEATER. 
(Plate 382.) 
Pseudqgerygone tenebrosa Hall, Victorian Nat., Vol. XVIII., p. 79, No. 5, Sept., 1901 : 
Fitzroy River, North-west Australia. 
Pseudogerygone tenebrosa Hall, Viet. Nat., Vol. XVIII., p. 79, 1901 (N.W.A.) ; id., Key 
Birds Austr., p. 110, 1906 ; Mathews, Handl. Birds Austral., p. 64, 1908. 
Gerygone tenebrosa tenebrosa Mathews, Nov. Zool., Vol. XVIII., p. 310, Jan. 31st, 1912. 
Gerygone tenebrosa christophori Mathews, ib., p. 311 : Carnarvon, mid-West Australia. 
Wilsonavis tenebrosa tenebrosa Mathews, List Birds Austr., p. 172, 1913. 
Wilsonavis tenebrosa christophori Mathews, ib. 
Ethelornis magnirostris whitlocki Mathews, Austral Av. Rec., Vol. III., pt. 1, p. 24, June 
30th, 1915 : Port Hedland, mid-West Australia ; H. L. White, Emu, Vol. XV., 
p. 250, 1916. 
Distribution. West Australia, from Carnarvon to the Fitzroy River. 
Adult male. General colour of the upper-surface pale mouse-brown with an ochreous tinge, 
including the crown of the head, sides of the face, hind-neck, back, upper wing- 
coverts, and outer aspect of the quills, the inner webs of the last pale brown with 
whitish inner edges ; upper tail-coverts inclining to ochreous-buff ; tail si m ilar to the 
back with an indication of a dark subterminal band and a pale spot on the inner 
web near the tips of the feathers ; throat and under-surface silky-white, including 
the under tail-coverts, axillaries, and under wing-coverts, somewhat darker on the 
sides of the body which is tinged with ochreous-yellow ; thighs grey ; under- 
surface of flight-quills and lower aspect of tail dark hair-brown with glossy reflec- 
tions. Eyes pale yellow ; feet and legs black ; bill and mouth black. Total 
length 116 mm. ; culmen 11, wing 59, tail 46, tarsus 22. Figured. Collected 
at Carnarvon, West Australia, on the 15th of September, 1911 and is the type of 
Wilsonavis tenebrosa christophori. 
Adult female. Similar to the adult male. 
Immature. Practically the same as adult, but with a yellow wash on sides of head. 
Nest. “ A very neat dome-shaped structure composed of shreds of bark and spider-web, 
was placed in a mangrove tree at a height of 8 feet above the mud on the tide line. 
Time occupied in building sixteen days.” (White.) 
* The Plate is lettered Wilsonavis tenebrosa. 
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