South island oystercatcher (IMAGE) Ecological Society of America Caption Invasive predators including hedgehogs and ferrets threaten shorebirds in New Zealand like this South island oystercatcher, which evolved without the threat of mammalian egg thieves. Olfactory misinformation helps protect nesting colonies from predators and ensure Photo Credit: Grant Norbury Credit Grant Norbury Usage Restrictions Credit Grant Norbury / Ecological Society of America License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.