The Green Bee-eater is a group of birds that belong to the family Meropidae, which contains three genera and thirty species. They are found in tropical and subtropical regions of Africa, Asia, Europe, Australia, and New Guinea. They are known for their brightly colored plumage, slender bodies, and long central tail feathers. They are also skilled hunters of flying insects, especially bees and wasps, which they catch on the wing and remove the stinger before eating.

There are three main species of Green Bee-eaters: the Asian Green Bee-eater (Merops orientalis), the African Green Bee-eater (Merops viridissimus), and the Arabian Green Bee-eater (Merops cyanophrys). They differ in their distribution, size, and coloration, but share many features and behaviors. They are all sexually dimorphic, with males having more vivid colors than females.

They are all social and vocal birds, often forming flocks and communicating with a variety of sounds. They are all monogamous and territorial, defending their nesting sites from intruders. They are all cavity nesters, digging tunnels in sandy banks or using natural holes in trees or rocks. They are all cooperative breeders, with helpers assisting the breeding pair in incubating the eggs and feeding the young.

The Green Bee-eaters are beautiful and fascinating birds that add color and life to the regions they inhabit. They are not threatened by extinction, and have large and stable populations. However, they may face some threats from habitat loss, fragmentation, and degradation, as well as from predators, parasites, and diseases. Therefore, it is important to protect and conserve their natural environment, and to appreciate their presence and role in the ecosystem.