How do platypuses make a nest?

Answer 1

Platypuses do not have "nests" in the usual sense of the word. Platypuses dig long burrows for shelter and protection, and during breeding season, the mother platypus prepares a chamber at the end of a burrow especially for the purpose of protecting the young.

Once the baby platypuses are hatched, the mother gives extra attention to the strength and lining of the chamber. As she leaves the chamber, the mother platypus makes several thin plugs made of soil along the length of burrow; this helps to protect the young from predators which would enter the burrow during the mother's absence. When she returns, she pushes past these plugs, thereby forcing water from her fur and helping to keep the chamber dry.

Answer 2

Platypuses lay their eggs in a chamber at the end of their burrow. They dig their burrow in the river bank of a freshwater river or creek. The burrows can be up to 30 metres long, and the entrance is positioned around 30 cm above the waterline. The chamber is lined with dry vegetation, and the females also builds several earthen plugs along the lens of the tunnel to deter predators.