The day when the baby of kangaroo put in an appearance from the mother's bag is a birthday.
The baby of a kangaroo (joey) is born in the ultra premature baby condition of the length 2 centimeters, weight of about 0.8 grams.
As it's too small, it is not found out when it was born or it enter in the mother's bag.
Then, at a zoo, the day when a baby kangaroo showed its nose for the first time from the mother's bag is being often a birthday.
The joey will usually stay in the pouch for about nine months (180–320 days for the Western Grey) before starting to leave the pouch for small periods of time.
It is usually fed by its mother until reaching 18 months.
Kangaroos are the only large animals to use hopping as a means of locomotion.
The comfortable hopping speed for a red kangaroo is 20–25 km/h, but speeds of up to 70 km/h can be attained over short distances, while it can sustain a speed of 40 km/h for nearly 2 km.
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