The nests of all the species in the genus _Sylvia_, as compared with those of the finches and linnets, are slovenly and loosely-made structures; and that of the Blackcap is no exception to the rule. The birds take some pains, however, to conceal it, and both male and female bestow a good deal of trouble upon it. It is generally placed a few feet from the ground, and is composed of dry bents, and lined with horsehair. The eggs, usually five in number, are white clouded with pale brown, and sparsely spotted with black towards the larger end. They closely resemble the eggs of the Garden Warbler, but differ in being smaller, and as a rule of a warmer tint; the pink or reddish-brown colour with which the eggs of the Blackcap are often suffused is not found in those of its congener. Both sexes take their turn at incubation, relieving one another to feed; but the male will often feed his partner on the nest, and then sit and sing to her. As to the song, it is simply delightful. I refrain, however, from attempting a description, for two reasons. The attempt has been made very often, and mere verbiage can convey but a very faint notion of its nature. It must be heard to be appreciated. If I were asked the question, “How am I to know the song when I hear it?” I would reply, “Approach the bird as slowly and as noiselessly as possible, until you can see the individual singing.” This is the only way to learn the songs of birds. The note of each species then becomes impressed upon the memory, and can afterwards be detected without hesitation when the bird is not in sight. To acquire this knowledge, however, of the songs of birds, one thing is necessary—an ear for music. This, unfortunately, cannot be imparted by teaching; and unless it exist as a gift of nature, the delight of music can never be experienced. There is this consolation, however, for those who are not musicians—they cannot feel so much the loss of a pleasure which they have never experienced. THE ORPHEAN WARBLER. (_Sylvia orphea._)