Lilac-breasted Roller. Botswana

The Lilac-breasted Roller (Coracias caudatus) is a member of the roller family of birds. It is widely distributed in sub-Saharan Africa and the southern Arabian Peninsula, preferring open woodland and savanna; it is largely absent from treeless places. Usually found alone or in pairs, it perches conspicuously at the tops of trees, poles or other high vantage points from where it can spot insects, lizards, scorpions, snails, small birds and rodents moving about at ground level. Nesting takes place in a natural hole in a tree where a clutch of 2–4 eggs is laid, and incubated by both parents, who are extremely aggressive in defence of their nest, taking on raptors and other birds. During the breeding season the male will rise to great heights, descending in swoops and dives, while uttering harsh, discordant cries. The sexes are alike in coloration. Juveniles do not have the long tail feathers that adults do. It is also the national bird of Botswana and Kenya.

The rollers are an Old World family, Coraciidae, of near passerine birds. The group gets its name from the aerial acrobatics some of these birds perform during courtship or territorial flights. Rollers resemble crows in size and build, and share the colourful appearance of kingfishers and bee-eaters, blues and pinkish or cinnamon browns predominating. The two inner front toes are connected, but not the outer one.

They are mainly insect eaters, with Eurystomus species taking their prey on the wing, and those of the genus Coracias diving from a perch to catch food items from on the ground, like giant shrikes.

Although living rollers are birds of warm climates in the Old World, fossil records show that rollers were present in North America during the Eocene. They are monogamous and nest in an unlined hole in a tree or in masonry, and lay 2–4 eggs in the tropics, 3–6 at higher latitudes. The eggs, which are white, hatch after 17–20 days, and the young remain in the nest for approximately another 30 days.

Birds (class Aves) are feathered, winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. With around 10,000 living species, they are the most speciose class of tetrapod vertebrates. All present species belong to the subclass Neornithes, and inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) Bee Hummingbird to the 2.75 m (9 ft) Ostrich. The fossil record indicates that birds emerged within theropod dinosaurs during the Jurassic period, around 160 million years (Ma) ago. Paleontologists regard birds as the only clade of dinosaurs to have survived the Cretaceous–Paleogene extinction event 65.5 Ma (million years) ago.

Modern birds are characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. All living species of birds have wings; the most recent species without wings was the moa, which is generally considered to have become extinct in the 16th century. Wings are evolved forelimbs, and most bird species can fly. Flightless birds include ratites, penguins, and a number of diverse endemic island species. Birds also have unique digestive and respiratory systems that are highly adapted for flight. Some birds, especially corvids and parrots, are among the most intelligent animal species; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.

Fauna of Africa, in its broader sense, is all the animals living on the African continent and its surrounding seas and islands. The more characteristic African fauna is found in the Afrotropical ecoregion - formerly called Ethiopian (the Sub-Saharan Africa). Lying almost entirely within the tropics, and equally to north and south of the equator creates favourable conditions for rich wildlife.

This list of African birds is a listing of all the bird species known from the continent of Africa.

The taxonomy of this list adheres to James Clements' Birds of the World: A Checklist, and reflects all changes to that work until July, 2005. Taxonomic changes are on-going. As more research is gathered from studies of distribution, behavior, and DNA, the order and number of families and species may change. Furthermore, different approaches to ornithological nomenclature have led to concurrent systems of classification (see Sibley-Ahlquist taxonomy).

The area covered by this list is the same as the Africa region defined by the American Birding Association's listing rules. It includes Socotra in the Arabian Sea, São Tomé and Annobon in the Gulf of Guinea, and the Canary Islands, but excludes Madeira. The region does not include Madagascar or the Comoro Islands.

Order: Struthioniformes. Family: Struthionidae

Order: Sphenisciformes. Family: Spheniscidae

Color or colour (see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, blue, yellow, green and others. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates.

Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.

The science of color is sometimes called chromatics, chromatography, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).

The Coraciiformes are a group of usually colorful near passerine birds including the kingfishers, the Hoopoe, the bee-eaters, the rollers, and the hornbills. They generally have syndactyly, with three forward-pointing toes (and toes 3 & 4 fused at their base), though in many kingfishers one of these is missing.

This is largely an Old World order, with the representation in the New World limited to the dozen or so species of todies and motmots, and a mere handful of the more than 90 species of kingfishers. This is the most diverse bird order in body weight, ranging from the 5.5 gram Puerto Rican Tody (Todus mexicanus) to the 4.5 kg Southern Ground Hornbill (Bucorvus leadbeateri), if the hornbills indeed belong under this classification.

The name Coraciiformes means "Raven-like", which is a misnomer (ravens are passerines). Specifically, it comes from the Latin language "Corax", meaning "Raven" and Latin "Forma", meaning "form", which is the standard ending for bird orders. [Terres p 104]

This is a list of national birds, most official, but some unofficial.