The RED-BEAKED TREE HOOPOE (_Irrisor erythrorhyncus_). The prevailing colour of this species is a beautiful metallic blue, shimmering with dark green and purple. The inner web of the first three quills is decorated by a single white spot, whilst the six next in order have two white spots. The three first tail-feathers are similarly adorned, and are also marked with white near the tip. The eye is brown, and the beak and foot bright red. The female is smaller, and her plumage less glossy. The young are deep green, nearly black, and almost lustreless. This species is from seventeen to eighteen inches long, and eighteen inches and a half broad. The wing measures six, and the tail nine inches. According to our own observations these beautiful birds principally inhabit the forests of North-eastern Africa, and are usually met with hopping or climbing incessantly from tree to tree, or bough to bough, in parties of from four to ten. These parties exhibit extraordinary unanimity in their manner of proceeding, and in all their movements seem to be playing an active game of follow-my-leader. Should one member of the little society suspend itself from a branch, all the rest immediately do the same; and even when uttering their cry as they rise into the air, the sounds are often so simultaneous that it is almost impossible to distinguish the individual voices. Ants and, according to some authorities, various kinds of insects, constitute their principal food. Few birds exhibit such strong attachment to their companions as we have frequently observed amongst groups of Tree Hoopoes; it is not uncommon for them to remain close together as though for mutual defence until repeated shots from the hunter's gun have brought one of the party to the ground, when the rest come rushing down, flapping their wings and uttering loud cries as they settle on the branches depending over the spot on which the victim lies. Despite the shortness of their legs, they run over the ground with tolerable ease. Their flight alternates between a gentle gliding motion and a series of rapid strokes with the pinions. Le Vaillant tells us that the female deposits her bluish green eggs, from four to six in number, at the bottom of a hole in a tree, and is assisted in the labour of incubation by her mate. * * * * *