c «. XVI. 
THE YOUNG LIKE ADULTS OF SAME SEX. 219 
f oll, 
sex ; but it would not be worth while to attempt to 
A 
<nv out flies 1 complex relations. 
" L Ass YI. The young in their first plumage differ 
Y °' n each oilier according to sex ; the young males 
Se>n bling more or less closely the adult males, and the 
■p in 9 females more or less closely the adult, females . — 
16 cases in the present class, though occurring' in 
Nous 
It 
ad 
*>at 
groups, are not numerous ; yet, if experience 
Hot taught us to the contrary, it seems the most 
Hfal thin" that the young should at first always 
j : ’nble to a certain extent, and gradually become 
N iUl( l more like, the adults of the same sex. The 
I 11 b male blackcap ( Sylvia atricapilla) lias a black 
tu d, that of the female being reddish-brown; and I 
. Informed by Mr. Blyth, that the young of both sexes 
p" be distinguished by this character even as nestlings. 
^ ff'e family of thrushes an unusual number of similar 
) ils<;s have been noticed; the male blackbird ( Tardus 
,^ yu ^ a ) can bo distinguished in the nest from the female, 
file main wing-feathers, which are not moulted so 
011 as the body-feathers, retain a brownish tint until the 
.^-“°nd general moult. 46 The two sexes of the moek- 
^■8 liird (T urduS polyglottus, Linn.) differ very little 
N each other, yet the males can easily be distin- 
Y'shed at a very early age from the females by shew- 
8 more pure white. 47 The males of a forest-thrush 
p of a rock-thrush (viz. Orocetes erythrogastra and 
j. tfr ocincla cyanea ) have much of their plumage of a 
, ' blue, whilst the females are brown ; and the nestling 
J^rvl 7 .... 
j. ( ’ le s of both species have their main wing and tail- 
a fbers edged with blue, whilst those of the female are 
Blyth, in Charlesworth’s ‘ Mag. of Nat. Hist.’ vol. i. 1837, p. 362 ; 
4 . r °tn information given to me by him. 
■'fuJubon, ‘ Ornith. Biography,’ vol. i. p. 113. 
