It has been said of the tree-pipit’s song that it is like that of the canary, and that it ‘is perhaps more attractive from the manner in which it is given than from its actual quality.’ Both statements are true in a measure: that is to say, they will be found true in many instances, but not always. For there are few birds in which the song varies so much in different individuals. The reiterated, clear thin notes and trills that so closely resemble those of the caged canary are heard in some songs, and not in others. As a rule, the bird perches on a favourite tree, very often using the same branch, and at intervals, rising into the air, ascends with rapidly-beating wings, and when it attains to the highest point--usually as high again as the tree, but sometimes considerably higher--the song begins with a succession of notes resembling the throat-notes of the skylark, but very much softer. With the song the descent begins, the open wings fixed motionless, and so raised as to give the bird a parachute-like appearance, falling slowly in a beautiful curve or spiral; on the perch the song continues, but with notes of a different quality--clear, sweet and expressive--repeated many times. Having ended its song, it remains perched for a few moments silent, or else uttering notes as at the beginning, until once more it quits its perch, either to repeat the flight and song, or to drop to the ground, from which it shortly ascends to sing again. The manner in which the song is given is thus always beautiful, and in some individuals there is a wonderful sweetness in the quality of the voice. The nest is built near the male bird’s favourite tree, and is placed in a hollow in the ground, and so well concealed by the grass and herbage that it is almost impossible to find it, unless by flushing the incubating bird from it. It is formed of fine dry grass and fibrous roots, and lined with horsehair. Four to six eggs are laid, of a dull white ground-colour, spotted with dull brown, grey, and purple, sometimes with blotches and hair-like marks among the spots. The eggs of this species vary a great deal. Rock-Pipit. Anthus obscurus. [Illustration: FIG. 41.--ROCK-PIPIT. ⅓ natural size.] Hind claw equal to the toe in length, much curved. Upper parts greenish brown, the centre of each feather darker brown; a whitish streak over the eye; under parts dull white, spotted and streaked with dark brown. Length, six and a quarter inches. * * * * *