Analysis of information sources in references of the Wikipedia article "카우아이오오" in Korean language version.
The Hawaiian word ʻāʻā means "dwarf" or "small" and was given to the Kaua'i species because it was smaller than the three races found on the other islands.
Negative factors have included destruction and modification of native forests; introduction of nonnative mammals to the islands (rats, Indian mongoose, pigs, cattle, sheep, goats, domestic cats) [...] introduction of nonnative birds and associated diseases; introduction of mosquitoes; and exploitation of the ‘ö‘ö for feathers.
The Hawaiian word ʻāʻā means "dwarf" or "small" and was given to the Kaua'i species because it was smaller than the three races found on the other islands.