What is the difference between kangaroos' and dingoes' reproduction?

Answer 1

Being vertebrates, both dingoes and kangaroos reproduce sexually.

Kangaroos are able to breed all year around. They are marsupials, so they have a unique method of reproduction. Female kangaroos have two vaginas, or what are called paired lateral vaginae. These are for the purpose of transporting the sperm to the womb, but there is a midline pseudovaginal canal for actually giving birth. Male kangaroos have substantial penises that are used in the same fashion as with other species, but unlike most species of marsupial, they do not have a bifurcated penis. Female kangaroos can often be in a state of almost permanent pregnancy, with an embryo "suspended" until the mother's body is ready to release it - whether that be when another joey is sufficiently weaned, or feeding conditions have improved.

The gestation period lasts 31-36 days. Baby kangaroos are the size of a jellybean when they are born. They are born blind and hairless. A baby kangaroo is born from the female's uterus and then climbs up the outer fur of the female and into the upward facing pouch where it attaches itself to a nipple until it becomes stronger. The mother kangaroo licks a path to the pouch to help guide the joey. Baby kangaroos live in their mother's pouch and feed by drinking milk. The teat swells in the joey's mouth, securing it in place so it cannot be accidentally dislodged. The joey will usually stay in the pouch for about 6-9 months.

Dingoes, on the other hand, are placental mammals. The breeding season for wild dingoes is Autumn/early winter (March through to June), and the young are fully developed when they are born. Their gestation period is around 63 days, twice as long as kangaroos. Dingoes tend to mate for life, unlike kangaroos, the female of which only ever mates with the dominant male in the mob. Because they are also mammals, dingo cubs still feed on mothers' milk, but unlike marsupials, they do not need to remain attached to the nipple.