What does the size variation between Waimanu manneringi and Waimanu tuatahi suggest?

Answer

Ecological partitioning

The coexistence of these two species, which differed significantly in size, points to ecological partitioning. This implies that even in the earliest stages of their evolutionary history, different penguin species occupied distinct ecological roles or niches within the same geographical environment.

What does the size variation between Waimanu manneringi and Waimanu tuatahi suggest?
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