Ancient horses such as Hyracotherium leporinum, a tiny horse relative from the Eocene of England, had feet like those of a modern tapir: four toes in front...
Trogons (Trogoniformes) are the only group of birds with a heterodactyl foot, in which the second toe is permanently reversed.
Reconstruction of the living...
The ancient bird, named Elektorornis chenguangi, lived 99 million years ago (Cretaceous period) and had a hyper-elongated third toe.
An artist’s reconstruction...
