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Two western grey kangaroo joeys can now be seen with their mothers hopping around their outdoor habitat at Brookfield Zoo's Australia House. At birth, the two unnamed joeys, born September 18, 2010, and October 9, 2010, were about the size of a jelly bean. Although the gestation period is 30 days, a joey is very underdeveloped at birth, and when born, it needs to crawl up to its mother's pouch without assistance. It then attaches itself to a teat where it remains to grow and develop for about nine months.
