The Tree Nightingales are found principally on arid spots, but sparsely overgrown with low brushwood, though they by no means avoid cultivated districts or the immediate neighbourhood of man. In Spain, they constantly frequent the vineyards and olive plantations, and in North-eastern Africa take up their abode in the gardens, or close to the huts of the natives, provided that they there find a few of their favourite bushes whereon to perch. We ourselves have never met with them in the primitive forests, or upon lofty mountains, though they often frequent wooded highlands. Such of these birds as inhabit Central Africa are stationary, whilst those occupying Northern Africa and Southern Europe migrate, leaving their more northern habitat about the end of September and returning in April. The males take their departure first, followed in a few days by their mates: arrived at their destination, they soon spread themselves over the face of the country. In their habits they are somewhat peculiar; they always select the very topmost point of a bush, post, or tree, as their ordinary perch, and on it they sit with tail erect, drooping wing, upright body, and legs drawn in, as they pour out their song, or glance sharply around in search of a worm or beetle. Should a prize of this nature be discerned, the bird will instantly dart down, flourishing and spreading its tail, and, after running rapidly for a few paces, seize its prey and return to its observatory, uttering a short call-note denoting extreme satisfaction. Their mode of flight and other movements are almost identical with those of the Nightingale, and like that bird they seek their food principally upon the ground, coming occasionally even into the streets of towns, when hard pressed for the means of subsistence, though at other times they are extremely cautious and timid. Strange to say, such as came under our own notice in Central Africa would permit the dark-coloured natives to approach quite close to them, but took instant alarm at the appearance of a white man. The voice of this species is capable of but very little variety, and will bear no comparison with that of its world-famed relative; yet, in spite of this inferiority, it is ever a favourite, its constant cheerfulness enlivening all that listen to its almost incessant song, which may be heard not only through the whole of the breeding season, but is uttered as the little creature runs, perches, or even flies through the air. The period of incubation commences at the end of May, and lasts for a considerable time. The nest, which is large and roughly formed of twigs, moss, and grass, lined with hair, wool, and feathers, is placed either against the trunk of a tree or on one of the larger branches, or in a thick bush. The eggs have a dirty white or blueish grey shell, marked with pale dark patches and brown spots. We are without particulars regarding the rearing of the nestlings, but have ourselves met with unfledged young as late as