Platypus head and body length averages 40-60cm from tip of bill to end of tail.
Platypuses are long-lived animals. They can live up to:
From May until July, the mammary glands each consist of a small structure, only about 1cm in length, under the skin on the female’s abdomen. Towards the end of this period the glands begin to enlarge and develop into large fan-like structures which occupy much of the ventral abdominal surface of the body and may even extend up towards the back.
Lactation lasts from 3 to 4 months and sometimes over 4 months in captivity (Grant, 2007).
Platypus milk is pink-white. Biochemical analysis of the milk has shown it to be very rich, containing more total solids than that of many other mammals. Platypus milk has high concentrations of iron, necessary for the formation of haemoglobin in red blood cells (Grant, 2007).
Platypus males have a pair of spurs.
A spur does not develop in the female platypus. However, a spur sheath of around 2mm is present in the ankle region for 8-10 months after emergence.
Venom is sometimes seen exuding as drops from the tips of the spurs of male platypuses, especially during the breeding season when the venom glands are enlarged.
The predominant symptoms attributed to the venom are:
Unlike most mammals that give birth to live, platypuses lay eggs. This is highly unusual, and it took 93 years from when the animals were first discovered to prove this to scientists. Find out more about platypus reproduction.