Reproduction: The testes are abdominal. Urine, faeces and eggs pass out to the exterior through a common opening (cloaca).The breeding season is recorded from July to October. However, it varies from place to place. One creamy yellow egg is laid at a time by the female. The egg is attached to the hair in the pouch.
The young hatch after a period of 7-10 days incubation. In the wild, the female keeps the young in a burrow until their spines are developed.
Behaviour: Ecnidnas are solitary animals. They are active at night during hot summer and diurnal during cold er periods.
Life span: Echidnas have been known to live for 30-50 years in captivity with individual variation.