On a steamy night in tropical far north Queensland, Barbara Wueringer and her team climb aboard their 4.5-metre boat on the Norman River.
Four species of sawfish used to range around the top half of Australia's coastline in ocean and estuarine environment
It's the same story every night on the 14-day survey, and they're forced to concede that this trip won't yield any precious data on one of Australia's most unique and threatened species.
Four species of sawfish used to range around the top half of Australia's coastline in ocean and estuarine environment
She believes people taking the saws as trophies was a big factor in their initial decline.