ducks kept by the Romans, i. 278;
domestication of the goose, i. 287;
gander frequently white, i. 288;
breeds of turkeys, i. 293;
incubatory instinct of mongrels of non-sitting races of fowls, ii. [44];
aversion of the dove-cot pigeon to pair with fancy birds, ii. [103];
fertility of the goose, ii. [112];
general sterility of the guans in captivity, ii. [156];
fertility of geese in captivity, ii. [157];
white peafowl, ii. [332].