Its limbs are hardly developed but its forelimbs are well enough developed to haul itself through its mother's belly hair to reach the pouch. Shortly after giving birth the female macropod becomes receptive again. If she successfully mates, she will again fall pregnant. Parental care If the female macropod does in fact become pregnant, the new embryo (called a blastocyst) is put into a state of suspended animation. The blastocyst will remain in this state until such a time when its sibling is old enough to leave the pouch. As soon as the pademelon joey is old enough to leave the pouch, the stalled embryo begins developing again. Even once a young pademelon vacates the pouch, it often puts its head back in to suckle. It only uses the teat that it used during the time it was in its mother's pouch. This allows the mother to supply two different types of milk for the more developed offspring that has left the pouch, and another for the less developed offspring that is still in the pouch. This reproductive system, known as embryonic diapause, is found in honey possums, bats, and seals as well as the other macropods. It is an extremely efficient reproductive system and if a young animal dies or is lost from the pouch, immediate development of the blastocyst can replace it quickly. Adaptations Females of the species have a pouch in which they keep their incompletely developed young. Mother red-legged pademelons make soft clucking noises to call their young. They are often found in small groups, foraging 30-50m apart so that they can warn each other of oncoming predators. They are largely nocturnal. Behaviour Red-legged pademelon behaviour varies under different circumstances. They are least active in the hours around midday and midnight. Late afternoon, evening and early morning they can be seen grazing on open grassland near the rainforest edges but quickly retreat into the forest if disturbed. They are generally solitary but may group together at night while feeding on grasslands. They feed at equal distances apart and are under the control of one dominant pademelon that controls their feeding area and sets their feeding distance. They communicate by vocalisations and thumping their heels on the ground. They use several vocalizations in social behaviour. In hostile interactions and if a female rejects a male during courtship, a harsh rasping sound is uttered. Soft clucking sounds are