A platypus does not have a specific time period of mating
Platypuses mate on land, not in the water.
Yes: platypuses must mate in order to reproduce.
Platypuses breed on land. They do not mate in the water.
Platypuses breed just once a year. Males will mate with several females during that time, but females will generally only mate with one male.
they mate with each other or sleep with each other
No. Bull Hippos fight each other to decide who gets to mate with the cow hippos. When the baby is born the mother is careful to keep it away from the bulls, as they will kill it in order to make the cow ready to mate again. The next time the cow may well mate with a different bull.
Platypuses sleep in long burrows they dig in riverbanks or creek banks.
Platypuses are egg-laying mammals, so they do not become "pregnant" in the usual sense. Scientists have not determined how long it takes for the eggs to finish developing after platypuses mate, but it is believed to be around a month. After the eggs are laid, they are incubated for around 8-10 days.
The platypus's mating and breeding season is spring and summer, from about September through to February, sometimes extending to March.
The platypus breeding season is spring and summer, from about September through to February, sometimes extending to March.
Young platypuses stay with their mother for about four months (115-125 days). They are nursed for the first three months.
Young platypuses remain with their mother, feeding on mothers' milk, for about four months (115-125 days).