Order PASSERIFORMES. 
No. 32. 
Family TVRDIDJE. 
TURDUS POLIOCEPHALUS. 
GREY-HEADED BLACKBIRD. 
(Plate 26.) 
Tukdus polxocephalus Latham, Index Ornith. Suppl., p. xliv., after May 30th, 1801: 
Norfolk Island. 
Ash-headed Thrush Latham, Gen. Synops. Birds, Suppl. ii., p. 373, 1801 : Norfolk Island. 
Turdus •polioce'phalus Latham, Index Ornith. Suppl., p. xliv., after May 30th, 1801. 
Merula nestor Gould, Proc. Zool. Soc. (Lond.), 1835, p. 186, April 8th, 1836 : Norfolk Island ; 
Jardine and Selby, Illustr. Ornith., Vol. IV., pi. 37, pt. vii., 1840. 
Merula 'polioce'phala Gould, Birds Austr. Suppl., pt. iii., pi. 30, Sept. 1st, 1859 ; id., Handb. Birds 
Austr., Vol. II., p. 528, Dec. 1865 ; Seebohm, Cat. Birds Brit. Mus., Vol. VIII., p. 258, 
Sept. 1881 ; id., Monogr. Thrushes, pi. 105, 1902. 
Merula fuliginosa Mathews, Handl. Birds Austr., p. 72, Jan. 1908. Not Turdus fuliginosus Latham, 
Index Ornth. Suppl., p. xlh., after May 30th, 1801, founded on the Sooty Thrush of Gen. 
Synops., Suppl. ii., p. 185, 1801, Watling drawing No. 147, indeterminable. 
Turdus fuliginosus fuliginosus Mathews, Nov. Zool., Vol. XVIII., p. 450, Jan. 1912. 
Planesticus fuliginosus Mathews, List Birds Austr., p. 324, Dec. 1913 ; Mathews and Iredale, 
Austral Av. Rec., Vol. IV., p. 110, Dec. 16th, 1920. 
Distribution. Norfolk Island. 
Adult male. Pore-head, lores and crown of the head greyish-brown ; nape and hind-neck lighter 
than the crown ; scapulars, mantle, rump and upper tail-coverts very deep brownish- 
black with a slight gloss ; wing-coverts and primary-quills blackish-brown, shafts black; 
tail uniform blackish-brown ; chin, throat, sides of the face and neck brownish-buff; 
remainder of the under-surface deep brownish-black. Eyes dark brown, bill blackish- 
yellow", feet brownish-yellow. Total length 213 mm. : culmen 18, wing 113, tail 79, tarsus 
32. Figured. Collected at Middlegate, Norfolk Island, on the 7th of June, 1913. 
The sexes are alike. 
Immature. Head blackish-brown with indistinct mesial shaft-stripes of dull buff; a fluffy collar 
of reddish-brown feathers round the hind-neck ; mantle, back, rump and upper tail- 
coverts blackish-brown, tinged with dark olive ; scapulars darker ; wing-coverts brownish- 
olive ; primary-quills, secondaries and tail blackish-brown, tinged with olive on the outer 
web ; chin, throat and upper chest brownish-ash; breast and abdomen dull reddish- 
chestnut ; sides of the body and flanks dark reddish-brown ; under tail-coverts blackish- 
brown, each feather with a broad mesial streak of white, widest at the tip ; under aspect 
of primary-quills brownish-ash. Bill brownish-yellow, eyes yellowish-brown, feet dark 
blackish-brown. Collected at Middlegate, Norfolk Island, on the 6th of March, 1913. 
Younger. Head, back and wing-coverts brownish-chestnut, each feather with a narrow shaft- 
streak, whitish at the base and inclining to reddish at the extremity; primary-quills 
brownish-ash with the shafts glistening black ; secondaries brownish-ash with the outer 
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