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Newborn kangaroos weigh just a gram or two. They are the size of a bean.

Once they get older, it depends entirely upon which species of kangaroo is meant. A six month old musky rat kangaroo, the smallest of all the kangaroos, will only weigh a few grams. A six month old red kangaroo, the largest of the kangaroos, will still only weigh just under a kilogram.

For a photo of a four-month old red kangaroo joey, click on the link.

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14y ago

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