What kind of an animal is a joey?
Kangaroos are the world’s largest marsupials. A Red Kangaroo can weigh 90kg and can grow two metres tall. Black Wallaroos, at around 20kg, are the smallest species (their name a portmanteau of wallaby and kangaroo).
Kangaroos are famous for their forward-opening pouch, where the joey (baby kangaroo) develops and suckles. A female kangaroo is known as a ‘flyer’ or a ‘doe’ and a male kangaroo a ‘buck’ or a ‘boomer’ (hence the nickname of the Australian men’s basketball team, the Boomers). They live in social groups called mobs.
Unlike the young of most other mammals, a newborn kangaroo is highly underdeveloped and embryo-like at birth. After a gestation of up to 34 days, the jellybean-sized baby kangaroo makes the journey from birth canal to pouch by clambering up through its mother’s fur. Once safely in the pouch, the joey suckles solidly for just over two months.
At around six months, when the baby kangaroo is sufficiently well developed, it will leave the pouch for short periods, returning when it needs to feed. Red kangaroos leave the pouch for good at around eight months and continue to suckle for another three to four months; grey kangaroos leave at about 11 months, continuing to suckle until they are as old as 18 months.
Interestingly, female kangaroos are able to suckle two joeys simultaneously – one in the pouch and one outside, offering two different types of milk, as well as having an egg ready for implantation.
More Info:
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