1 9 ▁species ▁of ▁land ▁sn ails ▁in ▁the ▁island ▁out ▁of ▁which ▁ 1 1 ▁are ▁en demic ▁and ▁four ▁are ▁in ▁the ▁threatened ▁category . ▁M t . ▁M ata fa o , ▁which ▁has ▁many ▁species ▁of ▁sn ails , ▁has ▁been ▁research ed ▁from ▁this ▁angle ▁since ▁ 1 9 1 7 ; ▁some ▁of ▁the ▁en demic ▁sn ails ▁reported ▁here ▁are ▁the ▁D ias to le ▁m ata fa oi ▁( en demic ▁and ▁may ▁be ▁ext inct ) ▁and ▁Sam o ana ▁abbre vi ata ▁( short ▁Sam o an ▁tree ▁sn ail , ▁Part ul idae ). ▁A chat ina ▁ful ica ▁( gi ant ▁African ▁land ▁sn ail ) ▁introduced ▁in ▁ 1 9 7 5 ▁is ▁reported ▁to ▁have ▁dam aged ▁gard ens . ▁Two ▁different ▁species ▁of ▁flying ▁fo x ▁( b ats ) ▁have ▁also ▁been ▁found ▁on ▁the ▁island ▁( des cribed ▁under ▁National ▁Park ). ▁ ▁Aqu af a una ▁Hard ▁cor als ▁recorded ▁are ▁ 1 7 4 ▁species ▁of ▁ 4 8 ▁gener a ▁and ▁sub - gener a . ▁ ▁Av ifa una ▁The ▁bird ▁species ▁recorded ▁are ▁under ▁en demic ▁category . ▁These ▁are : ▁The ▁A pl on is ▁at rif us cus ▁( S amo an ▁star ling ) ▁group ; ▁the ▁G ym nom y za ▁sam o ensis ▁( black - bre asted ▁h one ye ater ) ▁group ; ▁Hal cy on ▁rec ur vi ro str is ▁( flat