BREEDING.--These tenderly affectionate birds can hardly live when separated from one another. They incessantly repeat their call with a languishing note, and continually caress. They can sometimes be made to breed in the house, like the canary, but their eggs are rarely fruitful. In the wild state they breed twice every year, each time laying from three to six eggs, of a bluish white, spotted with violet and brown at the large end. Their nest, which they build in the most retired part of a wood, or in a solitary quickset hedge, is constructed with little skill, of twigs which are covered with moss. The young ones are hatched in fifteen days. Those which are to be taught must be taken from the nest when the feathers of the tail begin to grow; and must be fed only on rape seed soaked in water and mixed with white bread; eggs would kill them or make them blind. Their plumage is then of a dark ash-colour, with the wings and tail blackish brown; the males may be known at first by their reddish breast; so that when these only are wished to be reared they may be chosen in the nest, for the females are not so beautiful, nor so easily taught. Although they do not warble before they can feed themselves, one need not wait for this to begin their instruction[32], for it will succeed better, if one may say so, when infused with their food; since experience proves that they learn those airs more quickly, and remember them better, which they have been taught just after eating. It has been observed several times, that these birds, like the parrots, are never more attentive than during digestion. Nine months of regular and continued instruction are necessary before the bird acquires what amateurs call firmness, for if one ceases before this time, they spoil the air, by suppressing or displacing the different parts, and they often forget it entirely at their first moulting. In general it is a good thing to separate them from the other birds, even after they are perfect; because, owing to their great quickness in learning, they would spoil the air entirely by introducing wrong passages; they must be helped to continue the song when they stop, and the lesson must always be repeated whilst they are moulting, otherwise they will become mere chatterers, which would be doubly vexatious after having had much trouble in teaching them.