Kunyange zvazvo pasi pamwero kurwiswa kungava nokuda zvikuru kuedza kubudikidza mhuka dzepanyika vakuru muAustralia kuposita ngwenya yambiro zviratidzo panguva zhinji pangozi billabongs, nzizi, madhamu uye mahombekombe. zvishoma pachena kurwiswa vave akashuma muBorneo, Sumatra, Eastern India (Andaman Islands), uye Burma. muSarawak, Borneo, avhareji nhamba kurwiswa zvinofungidzirwa 2.8 pagore kwemakore kubva 2000 kusvika 2003. In Northern Territory muAustralia, vakaedza kutamisa ngwenya munyu mvura vane akashuma utsinye maitiro kune vanhu asi vakaratidza kuva anotyisa chikonzero sezvo ngwenya vari kukwanisa kuwana dambudziko rokutambudza vanhu akanga 106. Zvisinei, "Chidzidzo ichi chakaitwa muna 2007 muDarwin, Australia, pamwe chete nemamwe makambani uye zvikwata zvemari, zvichida akaita kuti vakawanda vanokwira kusvika 30%, uye zvichida kuti vanozviita kuti vawane mari kubva kunzvimbo dzakapoteredza apo ngwenya dzinogona kuitika.
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