INSTRUMENTAL MUSIC. 
61 
CtUp, 
XIII. 
from 
tlm if ^' s ^ ance to a male under confinement; but as 
- tack-cock continues bis spel for hours during 
ossivg days, and in the case of the capercailzie 
‘‘with 
that aU n b r ° n ^ °f P ass i° n »” we are led to suppose 
cfi. 1 . ^ le telQades which are already present are thus 
a uned« The voice of the common rook is known 
d ter during the breeding-season, and is therefore in 
som e 
harsh 
haix.1* " a ^ sexu al . 50 But what shall we say about the 
frav 6 Screams °fr for instance, some kinds of macaws ; 
tlie? t ^' ese birds as bad taste for musical sounds as 
ha," a Pl )ai ’cntly have for colour, judging by the in- 
genious contrai 
phi ”' /uo ooonast of their bright yellow and blue 
0 f la § e • It is indeed possible that the loud voices 
ady ail ' Y ma *° birds may be the result, without any 
fl le auta S e being thus gained, of the inherited effects of 
exc .;' 0 «tinued use of their vocal organs, when they are 
r ao . e . e . the strong passions of love, jealousy, and 
cun. f to this point we shall recur when we treat of 
4 Ua<i rupeds. 
mai'j ^ ave as yet spoken only of the voice, but the 
' v haf S Var i° us birds practise, during their courtship, 
Peacocks 
music. 
amf fr° C( dled instrumental 
Uc fr of Paradise rattle their quills together, 
Vibratory movement apparently serves merely 
atld the 
to 
of 
) v-., i J »UW»UUiUIIU OVA U.O AAAVy L vlj 
f tj? a n °ise, for it can hardly add to the beauty 
a gain?(- 11 ' t frJ Uma o e ‘ Turkey-cocks scrape their wings 
Prod: 
ground, and some kinds of grouse thus 
® l '°Use ° a ^ llzz ' u £ sound. Another North American 
hi s j.. ’ ^ Tttrav umbelhis, when with his tail erect, 
“ , 8 displayed, “ he shows oif his finery to the 
by es > who lie hid in the neighbourhood,” drums 
piuly striking his wings together above his 
49 L T — 
50 4 ^ ame Birds of Sweden,’ &c., 1SG7, p. 22, 81. 
er > k Pliilosoph. Transactions,’ 1824, p. 20. 
