Persian onager Persian onager The Persian onager ("Equus hemionus onager"), also called the Persian wild ass or Persian zebra, is a subspecies of onager (Asiatic wild ass) native to Iran. It is listed as Endangered, with no more than 600 individuals left in the wild and only 30 individuals living within North American institutions. The Persian onager is also simply named ', meaning "swift" in the Persian language, in which the word "gur" is preserved as the second syllable for ', which meant "donkey". Hence, onager. Sometimes, the term "onager" is reserved specifically for this subspecies. However, as the whole species of
Animal communication individual. The altered signal provides information that can indicate food, predators or conspecifics. Because the sender and receiver are the same animal, selection pressure maximizes signal efficacy, i.e. the degree to which an emitted signal is correctly identified by a receiver despite propagation distortion and noise. There are two types of autocommunication. The first is active electrolocation found in the electric fish Gymnotiformes (knifefishes) and Mormyridae (elephantfish) and also in the platypus ("Ornithorhynchus anatinus"). The second type of autocommunication is echolocation, found in bats and toothed whales. There are many functions of animal communication. However, some have been studied in