The common Toyorangabeast (Toyus rangus touristanus) is an invasive species to East Africa first observed in the mid 1900’s.
Migrating from Northern Europe and East Asia, it was first believed to be one species. On closer examination and exhaustive genetic testing performed by scientist from the Toyus Rangus society of the Invasive species center at the University of Scotland in Edinborough, it was proven that in fact they are two distinct species: Rangus arrogantus, the first to evolve and the much more common Toyus copicatus that didn’t occur until later in the century.
The two are easily identifiable. The Rangus occur in brighter colors, usually white or yellow. They tend to be much more finicky and only present themselves during bright daylight hours. Never at dawn and certainly not at dusk.
The more common Toyus occur in drab colors, usually brown or dull green. They are a more robust creature and are known to have great endurance. Usually present early in the morning and late into dusk they have been observed at great speeds racing from the Ngorongoro crater at sunset.
These beasts tend to migrate with the great migrating herds of East Africa. They occur most densely where predatory animals are present. They nosily come together at these sites where they immediately become quiet and docile.
To the practiced observer, it is easy to hear their calming clicks and oos and ahs that scientist believe is caused by the symbiotic relationship between Toyorangabeast and the predatory animals. The effect is, however only temporary and the Toyorangabeasts become restless and disperse most likely never to come together in the same group again.