Which of these is one of the known monotremes in the animal kingdom?

Cookie Bean, it is just called a Platypus. No one I know of in Australia calls it a Duck Billed Platypus.

Jonesy, We did... but duck billed got dropped about 45 years ago in kids text books at least as far as I know. I'm not an expert...just going on memory.🙂

Green Machine, LOL!!! Me too!

Cookie Bean, yes

Mike, oh my we probably don't want to know eh! 😞

Green Machine, It's funny you should say that! That's EXACTLY what I was thinking while I was TRYING to comprehend everything in that answer! " Great minds"????😊

Got to love monotremes!