Here's why:
* Habitat: Echidnas prefer open woodlands, grasslands, and scrublands. They are well-adapted to these drier environments, where they can easily dig burrows for shelter and find their food.
* Diet: They are insectivores, feeding mainly on ants and termites, which are abundant in open habitats. Rainforests generally lack the open spaces and soil conditions ideal for these insects.
So, while echidnas are Australian natives, they are more closely associated with arid and semi-arid regions than rainforests.