Black wildebeest
The black wildebeest or white-tailed gnu ("Connochaetes gnou") is one of the two closely related wildebeest species. It is a member of the genus "Connochaetes" and family Bovidae. It was first described in 1780 by Eberhard August Wilhelm von Zimmermann. The black wildebeest is typically in head-and-body length, and the typical weight is . Males stand about at the shoulder, while the height of the females is . The black wildebeest is characterised by its white, long, horse-like tail. It also has a dark brown to black coat and long, dark-coloured hair between its forelegs and under its belly.
Tiger
The Bengal and Siberian tigers are amongst the tallest cats in shoulder height. They are also ranked with the Caspian tiger among the biggest cats that ever existed. However, on average, a wild adult male Siberian tiger at body weight is outweighed by an adult, male Bengal tiger at .
A well-known allele found only in the Bengal population produces the white tiger, a colour variant first recorded in the Mughal Empire in the late 16th and early 17th centuries. Genetically, whiteness is recessive: a cub is white only when both parents carry the allele for whiteness. It is not albinism, pigment being evident in the white tiger's stripes and in their blue eyes. The causative mutation changes a single amino acid in the transporter protein SLC45A2. White tigers are more frequently bred in captivity, where the comparatively small gene pool can lead to inbreeding. This has given white tigers a greater likelihood of being born with physical defects, such as cleft palate, scoliosis (curvature of the spine), and strabismus (squint).