Would a platypus give a warning?

Answer 1

If the question means whether the platypus would give a warning before using its spur to defend itself, the answer is no. Platypuses are relatively defenceless creatures, and it would be a very foolish person who provoked a platypus into attack. If encountering a predator, a platypus also would not give a warning, but would use everything within its means to defend itself.