Mules can't reproduce.
Mule is a living organism but it is hybrid between horse and donkey,so it is incapable of reproduction.
Moreover, male ligers have lowered testosterone levels and sperm counts, rendering them infertile while females, though capable of reproducing with either a lion or a tiger, often give birth to sickly cubs that don?t survive.
The vast majority of animals need to breed to reproduce. But a small subset of animals can have offspring without mating. The process, called parthenogenesis, allows creatures from honey bees to rattlesnakes to have so-called “virgin births.”
Many species of fish, like the kobudai, are known as “sequential hermaphrodites”: they can switch sex permanently at a specific point in their lives. The majority of “sequential hermaphrodites” are known as “protogynous” (Greek for “female first”): they switch from female to male.
Like many other animal hybrids around the world including the Mule and the Liger, however, the Zonkey is a sterile animal meaning that it cannot produce offspring of its own.
Pete Getz was attacked and killed by Rocky the liger, that's a cross between and lion and tiger.
As with other hybrid animals, including both Zonkeys and Mules, Zorses are sterile, meaning that although they still display normal breeding behavior, they are unable to produce offspring of their own.
Living things grow and they reproduce. Growth is a way to generate the materials for reproduction. Reproduction is a way to make new organisms that can grow.
Darwinian definition claims that living is that, what is capable of undergoing evolution through natural selection. One of the conditions of evolution is reproduction. So mule is unable to reproduce. Therefore, mule is an inanimate object.
Non-living things “grow” by accretion. It occurs through adding materials externally. For example, A snowball may increase in size due to the accumulation of smaller units of its own on its outer surface. Non-living things never die as they do not have cells with a definite lifespan.
A wholphin, a cross between a female bottle-nosed dolphin and a male false killer whale, is one of the rarest hybrid animals on earth.
There are documented cases of Soviet experiments in the 1920s where artificial insemination was attempted using female chimps and human sperm. However, none of these experiments resulted in a pregnancy, much less the birth of a 'humanzee'.
The large Liger growth is a result of its parents (Mother Tiger and Father Lion) not possessing the limiting growth gene. This limiting growth gene is found in male TIgers and female lions which is why most researchers believe Tigons are on average smaller than their parents exhibiting negative growth dysplasia.
Although they rarely meet in the wild, lions and tigers are still so closely related that they are able to interbreed, and in captivity they occasionally do. But successful interbreeding is the key, and the hybrid offspring are usually sterile and short-lived.
Conservation scientist Luke Dollar says that any crossbreeding between big cat species is unethical and is the result of greed or irresponsible breeding. “I can think of no legit excuse for a liger or tigon to exist,” says Dollar, program director for National Geographic Society's Big Cats Initiative.
Ligers are fertile and can mate with other ligers, lions, or tigers.
A zorse is the offspring of a zebra stallion and a horse mare. This cross is also called a zebrose, zebrula, zebrule, or zebra mule. The rarer reverse pairing is sometimes called a hebra, horsebra, zebrinny, or zebra hinny. Like most other animal hybrids, the zorse is sterile.
“They can cost anywhere from $500 for one that is wild, older, and virtually impossible to train or has been handled incorrectly and does not trust people, to $30,000 for one that has been trained correctly. There are only about 100 zorses in the world,” Nunke says.
Lifelong attachment
In native birds that form long-lasting bonds, including butcherbirds, drongos and cockatoos, differences between the sexes are small or non-existent – that is, they are “monomorphic”.
Male kalutas, small mouselike marsupials found in the arid regions of Northwestern Australia, are semelparous, meaning that shortly after they mate, they drop dead. This extreme reproductive strategy is rare among vertebrates —only a few dozen are known to reproduce in this fashion, and most of them are fish.
The female red-sided garter snake, a species native to Manitoba, Canada, has no shortage of potential lovers. According to Christopher Friesen at the University of Wollongong in Australia, anywhere from 10 to 30 attentive males may pursue her at once, literally enveloping her with their love.