No. Psittacosis is unique to parrots.
gram negative
Yes. Only female platypuses are able to lay eggs. This is the case with all egg-laying vertebrates.
Platypuses are only able to live alongside freshwatersources such as freshwater creeks and rivers. They cannot hunt in salty water.
Usually members of the Parrot family.
The correct spelling is contagious (able to infect others).
Parrot
No. America does not have platypuses. Platypuses are endemic to eastern Australia.
Platypuses is the correct spelling.
When actively diving and hunting for food, platypuses can hold their breath for around two minutes. When they are not active, but are perhaps trying to stay unnoticed by predators, they are able to hold their breath for up to eight minutes.
Platypuses were not invented. They were discovered by someone.
Platypuses are found only in Australia.
Platypuses are considered carnivores.