Not found on New Guinea, these creatures join echidnas to comprise order monotremata.
These creatures uniquely possess ten sex chromosomes, one of which is the ZZ/ZW pattern that they share with birds. Venom from these animals' crural glands can lead to oedema and hyperalglesia, though they do not use their vemom for hunting, instead using electroreceptors that detect the muscle contractions of their prey as they move through water. Not found on New Guinea, these creatures join echidnas to comprise order monotremata. For ten points, name these amphibious Australian mammals.
These creatures uniquely possess ten sex chromosomes, one of which is the ZZ/ZW pattern that they share with birds.
{duckbill} {platypus} (accept either underlined part or {O}rnithorhynchus {anatinus})