Ovine rinderpest the implementation of this global plan. It is considered feasible to eradicate ovine rinderpest in 15 years. Ovine rinderpest Ovine rinderpest, also commonly known as peste des petits ruminants (PPR), is a contagious disease primarily affecting goats and sheep; however, camels and wild small ruminants can also be affected. PPR is currently present in North, Central, West and East Africa, the Middle East, and South Asia. It is caused by "small ruminants morbillivirus" in the genus "Morbillivirus," and is closely related to, among others," rinderpest morbillivirus, measles morbillivirus", and "canine morbillivirus" (previously known as canine distemper virus). The disease is
Animal coloration resemblance; mimesis, resembling other objects of no special interest to the observer, which relates to special resemblance; countershading, using graded colour to create the illusion of flatness, which relates mainly to general resemblance; and counterillumination, producing light to match the background, notably in some species of squid. Countershading was first described by the American artist Abbott Handerson Thayer, a pioneer in the theory of animal coloration. Thayer observed that whereas a painter takes a flat canvas and uses coloured paint to create the illusion of solidity by painting in shadows, animals such as deer are often darkest on their backs,