The olfactory system of the tammar wallaby is developed at birth and directs the neonate to its mother's pouch odours.

@article{Schneider2009TheOS,
  title={The olfactory system of the tammar wallaby is developed at birth and directs the neonate to its mother's pouch odours.},
  author={Nanette Yvette Schneider and Terrence P Fletcher and Geoffrey Shaw and Marilyn B Renfree},
  journal={Reproduction},
  year={2009},
  volume={138 5},
  pages={849-57}
}
In kangaroos and wallabies at birth the highly altricial newborn young climbs unassisted from the urogenital opening to the teat. Negative geotropism is important for the initial climb to the pouch opening, but nothing is known of the signals that then direct the neonate downwards to the teat. Here we show that the newborn tammar wallaby (Macropus eugenii) has the olfactory apparatus to detect smell. Both the main olfactory system and vomeronasal organ (VNO) are developed at the time of birth… CONTINUE READING

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