long-beaked echidna, a little-known, primitive mammal that lays eggs, lives in Papua New Guinea. Only one specimen, found in 1961, has ever been seen by scientists.echidna’s survival was found in the form of holes in the ground which showed where the creature had been hunting for worms to eat. The holes were from the animal’s distinctive beak and in some places it had pressed so far into the soft mud that it had left impressions of its head in the ground. Burrows were also found, but none was occupied.