Maui Nui

Long after the breakup of Maui Nui, the four modern islands retained plant and animal life similar to each other.

The four younger volcanoes are Lāna‘i, West Maui, Kaho‘olawe, and Haleakalā, which probably formed between 1.5 and 2 million years ago.

[2] At its prime 1.2 million years ago, Maui Nui was 14,600 square kilometres (5,600 sq mi), 50% larger than today's Hawaiʻi Island.

Maui, Lāna‘i, and Molokaʻi were connected intermittently thereafter, most recently about 18,000 years ago during the Last Glacial Maximum.

Long after the breakup of Maui Nui, the four modern islands retained similar plant and animal life.

Many of Hawaii's native species declined or became extinct after Polynesian arrival or in the modern era, making the study of Hawaiian biogeography more complicated.