Resembling little more than a pink worm measuring about an inch long and weighing a fraction of an ounce, they are born hairless, blind, and deaf.
Daudz neatšķirdamies no rozā tārpiņa, ķengurēns piedzimst aptuveni divus centimetrus garš un nepilnu gramu smags, un tas ir kails, akls un kurls.