How many wallabies are there

The animals, which graze on grasslands, foraging willows and young shrubs, have normally confined themselves to the north of the island but scientists say they are on the move and they have been spotted in the south. Paige Havlin, who conducted a research project into the red-necked wallabies as part of her university thesis, found that the mammals had most likely descended from escapees of the Curraghs Wildlife Park , including Wanda, the wallaby who escaped shortly after the park opened and returned later the same year.

Another incident occurred in when eight wallabies dug under their enclosure and escaped. The strongest evidence for this is that the densest population of wallabies in the Isle of Man lives directly behind the wildlife park on the Curragh wetlands site. A very small minority of these wallabies appeared to have blindness; when individuals did appear to be blind presenting as a cataract-like milky layer on one or both of their eyes the problem was usually accompanied by other ailments such as an inner-ear infection, characterised by a tilted head.

A genetic study of the population, though, would be required to fully dispel this myth. If the female wallaby becomes pregnant again while the joey is still in her pouch, the embryos development will pause until the joey leaves the pouch, a phenomenon called embryonic diapause. The life span of a wallaby is around 9 years in the wild.

Four species in this family have already gone extinct. Many others are Endangered, which means that they face a very high risk of extinction in the wild. Others are considered Vulnerable, which means that they face a high risk of extinction in the wild. Some actions are being taken to help particular species, including protecting their habitats and breeding them in captivity, so they may be later reintroduced into the wild.

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