The DWARF SWIFT (_Cypselus parvus_) is a small species found in some parts of Central Africa, where it usually frequents the forests or woodland districts. Its length does not exceed five inches and a half, and its breadth is eleven inches. The plumage is almost entirely dark grey, lightest upon the throat; the wings are of a brownish hue. In its general habits the Dwarf Swift resembles its congeners, but the structure of its nest is so remarkable as to merit a minute description. Brehm tells us that upon one occasion, whilst travelling in the vicinity of the Blue River, he was attracted by cries uttered by one of these birds as it flew backwards and forwards near a lofty palm whose branches towered above the surrounding trees. On going nearer the spot, he observed that the Swift kept disappearing, as it were, within one of the large, fan-like leaves, against the glossy green of which several white objects were distinctly visible. Thinking this circumstance somewhat extraordinary, he climbed the tree, and found, to his no small astonishment, that the said green leaf was the nest, and the white objects, the eggs, of the noisy bird. We should, perhaps, be more accurate if we said that the leaf formed the outer part of the nest, the actual chamber for the young being composed of cotton wool and feathers, fastened together with saliva, and in shape resembling a round spoon: the interior did not exceed two inches and a half in diameter. Guided by a most wonderful instinct, this little builder seems perfectly aware of the danger to which its aërial abode is exposed from a strong wind, and takes the very safe precaution of gumming with her tenacious spittle not only the nest and eggs, but the nestlings also, firmly to the leaf. Another peculiarity in the domestic arrangements of this species is that the two white eggs that compose a brood are fastened end upwards, in the very limited bed prepared for their reception. THE PALM-TREE SWIFT. The PALM-TREE SWIFT (_Cypselus palmarum_) constructs its nest in a very similar manner to the Dwarf Swift. THE STEEPLE SWIFT. The STEEPLE SWIFT (_Cypselus apus_) is from six to seven inches long and fifteen and a half broad; its wing measures six and a half, and tail three inches. Its plumage is of a blackish brown, with the exception of the throat, which is white; the eyes are brown, the beak and feet black.