Unfortunately for both henry and the kakapo , stolzenburg says , resolution island was within swimming distance of the mainland - and stoats can swim .
Against them , the kakapo had no defence whatever .
鹦鹉完全没有能力抵抗它们。
Kakapo numbers quickly shrank so that , once new zealand 's third most populous bird , they soon only lived in small enclaves scattered around the country .
