Which large island hosts both the short-beaked echidna and is the primary location for the endemic long-beaked echidna species?

Answer

New Guinea

New Guinea is the crucial secondary location for echidnas, as it hosts both the short-beaked species and is the habitat where the long-beaked species is almost entirely restricted.

Which large island hosts both the short-beaked echidna and is the primary location for the endemic long-beaked echidna species?
Geographyhabitatanimalmammalechidna