5'A BIHDB OF ILLINOIS. 



Tiirdus mustelinus (Gmol.) 



WOOD THRUSH. 



Popular 8ynonym«.-I5oll TbrusU: Bell liird; Wood Robin: Orlve des BoIr nnd 

 Morlo luiiiiD (Cunadiun Frenchi. 



Turdiix iHKs/^diiK.i Omei,. S. N. 1, 1788. 817.— NuTT. Mnn. 1, 1832. 313. -AuD. Orn. BloB. I, 

 \Ki-2. sn: V, ISItn. HG. pi. 73: B. Am. 111. IU\.-M. pi. U4.-BAIBD. B.'N. Am. 1818. 21i: Cttt. 

 N. Am. B. 1K39, No. US: Kovlew. \im. IH.-Couek. Key. ISTi, Ti: Chock Ll»l. iwn. No. 

 3: 2d od. 1882. No. C: B. N. W. 1874, 2.-B. B. & U. Hist. N. Am. B. I, 1871, 7. pi. 1. Kle. 1. 



Titrdim {Hi/locirhla) niustelimia CouES. B. Col. Val. 1S78, 28. 



Ilylociehla mnstrUua ItiDOW. Proc. U. S. Nut. Miis. ill, ISSO. 166: Nom. N. Am. B. 1881, No. 1. 



Turdus melodus WiLS. Am. Orn. i, 1808, :t5. pi. 2. FIk. 1. 



run. F.anteni United ytatas and British Provinces la summer, brooding throughout. 

 In winter. Mexico, (iiiatemala, Cuba, and Bermuda!). 



8p. Cii. .\bovo bricht tawny clnnamon-tirown. more rufescent anteriorly, more (trajr- 

 Ish posteriorly; aurlculars streaked white and dusky. Lower parts white, the breast and 

 sides with lareo blackish spots. 



Adult in stuiiiner: Above cinnamon-brown, becoming bright tawny rufous on the 

 head, the color clearer and somewhat lighter ou the eorvl.t; wings loss reddish than the 

 back, nimp still more olivaceous, and tail decidedly grayish brown. A pure wliite orbital 

 ring: lores grayish white, more gray Immediately In (ront of the eye; aurlculars dusky, 

 distinctly streaked with whitish. A white malar stripe, curving upward beneath the au- 

 rlculars. the anterior portion speckled with dusky. Entire lower parts white, usually 

 somewhat tinged with buff on the breast; sides of throat bounded by a stripe of aggre- 

 gated blackish cuncate streaks; jugulum marked with distinct cuneate or deltoid, the 

 breast and sides with larger, broader. Inversely corJate, spots of black : abdomen and 

 crissum iinmnculate: thront with very few minute spots, or entirely immaculate. Bill 

 dark horn-color, the basal half of the mandible paler: iris dark brown; tarsi and toes 

 pule brown. Wing 4.10— 1.50; tail, 3. 00-3.. ■«): culmen, .70— .75: tarsu.s, 1.20— 1.30; middle 

 toe, .70— .75. 



Adult in tci'iter: Similar, but jugulum more decidedly tinged with bull. 



Yoima.fii-.it plumage: Similar to the adult, but feathers of the plleum nnd back with 

 paler (ochracuous) shaft-streaks; middle wing-coverts with terminal triangular spots of 

 ochraceou". the greater coverts narrowly tipped with the same; spots on breast, etc., less 

 sharply defined. 



Specimens of this species vary considerably in the intensity of the 

 color of the upper surface, the variation involving Imtb the rufous of 

 the anterior and the grayish brown of the posterior portions. Beneath, 

 the jugulum is occasionally without any buff tinge whatever, while 

 in some spring sjjecimens this color is quite as evident as in most 

 autiininal or winter exiimples. The spots on the breast and sides 

 also vary much in size and exact shape, being larger :ind more 

 rounded in some, smaller and narrower in others ; in some speci- 

 mens they are deep black, in others decidedly brownish. Extreme 

 variations, however, in this respect, appear to be purely individual, 

 and not at all dependent on locality. 



