Archeops is a large, flying creature that bears similarities to both birds and reptiles. Its featherless, scaly head is coloured green on top and red on the bottom. Its body is covered with frayed-looking, yellowish feathers. It has blue feathers designed for flight on its arms and legs enabling all four of its limbs to act as wings, along with a ring of smaller green feathers on the ankles. All of these "wings" bear sharp claws. Similar to its head and neck, its tail is completely red and featherless except for a fan of blue feathers at the end, and as with the Archaeopterygiformes, it has fully-movable vertebrae in its tail instead of a pygostyle. Its mouth is filled with sharp teeth. Its eyes are white with black pupils and no irises.