To which two primary landmasses is the echidna's natural global distribution geographically concentrated?

Answer

Australia and the island of New Guinea

Echidnas are endemic to a very specific corner of the globe, confined only to Australia and the island of New Guinea, representing a unique grouping of mammals.

To which two primary landmasses is the echidna's natural global distribution geographically concentrated?
Geographyhabitatanimalmammalechidna