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.

Related Questions
To which two primary landmasses is the echidna's natural global distribution geographically concentrated?What unique classification describes echidnas as egg-laying mammals that share a lineage with the platypus?What is the scientific genus name associated with the short-beaked echidna?Which genus encompasses the long-beaked echidna species, primarily restricted to one large island?Which island, besides mainland Australia, is inhabited by the Short-Beaked Echidna (*Tachyglossus*)?What environmental survival mechanism do echidnas utilize when food is scarce or conditions become excessively harsh?What potential gap exists in the otherwise widespread distribution of the Short-Beaked Echidna across Australia?In terms of elevation, how high up in the range can echidnas be recorded living?Which two insect groups form the diet for which the short-beaked echidna must have access to suitable soil?Which large island hosts both the short-beaked echidna and is the primary location for the endemic long-beaked echidna species?