The Making of Species 
catcher (Zerpsiphone paradisz) drive away another 
and then go and make up toa cock bird. Simi- 
larly, I have seen two hen orioles behave in a 
very unladylike manner to one another all 
because they both had designs on the same cock. 
He sat and looked on from a distance at the 
contest.” 
Darwin quotes, on page 500 of Zhe Descent 
of Man, a case of a male exercising selection: 
“Tt appears to be rare when the male refuses 
any particular female, but Mr Wright of Gelders- 
ley House, a great breeder of dogs, informs me 
that he has known some instances: he cites the 
case of one of his own deerhounds who would 
not take any notice of a particular female mastiff, 
so that another deerhound had to be employed.” 
Similarly, Finn records, in the Country-Side 
for August 29th, 1908, that the male Globose 
Curassow (Crax globzcera) in the London Zoo- 
logical Gardens, which bred with the female 
Heck’s Curassow (C. heckz), as related on p. 104, 
selected the hen of this very distinctly coloured 
form or species in preference to any of the 
typical hens of his own kind. 
The cases on record of cocks being in a position 
to select their mates are comparatively rare, while 
instances of selection on the part of the hens are far 
more numerous. 
Hence it would seem that the sex, which is in 
a minority, and so has the opportunity of select- 
304 
