Complex sentence: It is known from a few bones found in cave strata layers.The Kaua`i Finch, unlike all the other Finch subspecies besides the Oaho Finch, they were extinct, even when the first scientists arrived in the 1700s.
Split into simpler sentences: It is known from a few bones found in cave strata layers. The Kauai Finch, unlike all the other Finch subspecies besides the Oahu Finch, they were extinct, even when the first scientists arrived in the 1700s.