Australia has a crocodile problem. In the last two decades, attacks have risen sharply after the population exploded. Along with safety messaging, government officials are increasing the number of permitted crocodile kills, but experts say the move isn't likely to work given how mobile crocodiles are — kill one, and another will immediately move into its territory.
But a new, stealthy way of preventing attacks may be on the horizon. The tool involves using the genetic fingerprints of crocodiles to identify areas where these predators are present. By harnessing environmental DNA (eDNA), wildlife officials could test waterways and warn swimmers, boaters and campers to avoid areas where crocodiles are, or have recently been.
