308 DWIGHT 



Turdus mustelinus Gmel. Wood Thrush 



1. Natal Down. Mouse-gray. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Above, deep raw umber-brown, paler on the crown and nape, the rump olive, 

 spotted on crown and nape with tawny olive, tips of the wing coverts and a few 

 linear streaks on the back also tawny olive. Wings and tail tawny olive-brown, 

 the wing coverts with slightly paler edgings. Below, pure white, tinged with 

 buff on the jugulum and sides, heavily spotted on the throat and breast and less 

 obviously on the sides with large rounded black spots. Auriculars dusky, lores 

 ashy, orbital ring white and prominent. Bill and feet pale pinkish buff becom- 

 ing slightly darker with age. 



3. First Winter Plumage acquired by a partial postjuvenal 

 moult, beginning the end of July, which involves the body plu- 

 mage, the lesser coverts, usually a part of the other coverts, but 

 not the rest of the wings nor the tail. Young and old often be- 

 come indistinguishable. 



Similar to previous plumage but without streaks on the back and whiter below with 

 larger spots. Above, russet, brightest on the crown, olive tinged on the rump. 

 Below, white, heavily spotted with black, a wash of pale buff on the throat. 

 Orbital ring white and conspicuous. 



4. First Nuptial Plumage acquired by wear, the buff wash 

 being mostly lost and the spots becoming rather duller. There 

 is no obvious fading, above. 



5. Adult Winter Plumage acquired by a complete post- 

 nuptial moult in July and August. Practically indistinguish- 

 able from first winter dress, averaging a little darker and the 

 wing edgings uniform with the wings without terminal edgings 

 or spots. 



6. Adult Nuptial Plumage acquired by wear as in the 

 young bird. 



Female. — The sexes and moults are alike. 



Turdus fuscescens Steph. Wilson's Thrush 



1. Natal Down. No specimen seen. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Above, including sides of head, deep raw umber-brown with dusky edgings and 

 large guttate spots of tawny olive. Wings and tail tawny olive brown the greater 



