6 
Canary Breeding 
The terms " pink-eye " and " dark-eye " are strictly reserved for those chicks in 
which these qualities were noted within two days of hatching. 
These results agree with those of Doncaster with regard to sex inheritance 
in the moth Abraxas grossulariata, and its variety lacticolor, which appear in 
Report IV to the Evolution Committee of the Royal Society. 
The summary of my matings give the following results (see Appendix B, 
p. 40): 
Pink-eyed </ x dark-eyed $ : 14 matings* = 24 dark-eyed cf + 21 pink-eyed % 
+ 4 dark-eyed o + 7 pink-eyed o. 
If we add the 4 dark-eyed o to the 24 dark-eyed cf, and the 7 pinked-eyed o 
to the 21 pink-eyed % , which would be probably a correct procedure, we should 
have equality of the sexes and 28 dark-eyed males against 28 pink-eyed females. 
A fuller discussion of this subject will be found in Section VII (iii) below. 
Wild Cinnamon Sports and Cinnamon Hybrids. For some years I have been 
collecting all the wild cinnamon birds which I could acquire. Any rarity of this 
sort is usually called a cock in order to enhance its value (a remark which 
applies also to many museum specimens), but I have now had a fair number in my 
aviaries, and have always succeeded in getting these cinnamon "cocks" to lay 
(e.g. Plate II, fig. 2)f. Some of these have also been examined post-mortem and 
the sex verified. I have also seen and examined many cinnamon wild birds 
belonging to other fanciers. I have further bred six cinnamon hybrids of different 
sorts (Plate I, fig. 1), and seen and examined several others. All these cinnamon 
wild birds and hybrids I have found to be females. 
Therefore I feel confident in stating that {a) all cinnamon wild birds are 
females, and {b) that male cinnamon hybrids must be very rare, for, so far, I have 
seen nonej. These statements are based upon : — 
1. Twenty cinnamon wild birds and cinnamon hybrids seen at bird-shows, 
and in bird-rooms. 
2. The following living examples at present in my possession : 
(a) Four cinnamon and very pale cinnamon (almost white) greenfinches 
{L. chloris) (e.g. Plate II, fig. 2). 
(Z>) One cinnamon yellowhammer (E. citrinella). 
(c) Three cinnamon canary-greenfinch hybrids (Plate I, fig. 1). 
3. The following formerly in my possession : 
(a) One self-cinnamon canary-greenfinch hybrid. 
(b) One self-cinnamon canary-linnet {L. cannabina) hybrid bred by myself. 
* Sex uncertain = o. 
t The cinnamon greenfinch hen usually lays pale cinnamon eggs devoid of markings unless 
mating has taken place. 
X John L. Burnett, Govan, informs me that he has bred male cinnamon greenfinch hybrids. 
