332 BIRD BEHAVIOUR 



but this is the case with the hybrid between Ruddy 

 Sheldrake and Egyptian Goose (Chenalofex &gyp- 

 tiaca), which favours the former ; between the Pope 

 Cardinal-Finch (Paroaria dominicana) and Red- 

 crested Cardinal (P. cucullata), which follows the 

 latter ; and with hybrids between domestic Fowls 

 and other birds, such as the Pheasant, Guinea- Fowl, 

 and Peacock, in all of which the coloration is purely 

 that of a Fowl or nearly so, so far as I have seen. 

 Specimens may be studied at South Kensington. 



When the colour is thus dominant, however, the 

 shape and size incline more to that of the recessive 

 parent ; thus, the very rare Peacock-Fowl hybrid 

 shown recently at the Zoo was a most obvious 

 Peacock in size and general shape, though in ac- 

 cordance with the general rule of the " cancelling 

 out " of different decorations, it never developed 

 train or crest any more than comb, hackles, or 

 wattle. The Cardinal hybrid had the short head- 

 feathering of the Pope, not the long peak-crest of 

 the other parent. 



When two species of Ducks, one with an undress 

 plumage in the drake and the other without, are 

 crossed, the undress is dominant and such a phase 

 occurs in the hybrid, as is well seen in that be- 

 tween the Rosy- billed Pochard (Metopiana pepo- 

 saca), which always retains masculine plumage, and 

 the Red-crested Pochard with its very distinct 

 eclipse. I note, however, that in a hybrid between 

 the Red and Green Jungle-Fowls now in the Zoo 

 there is no " undress " neck- feathering assumed. 



