Hundreds of volunteers have braved the wind and rain for a citizen science experiment to count migrating whales. The Organisation for the Rescue and Research of Cetaceans' (ORRCA) annual whale census has taken place across the NSW east coast today. It sees volunteers across 27 coastal headlands spanning the state count the number, species and behaviour of travelling whales. More than 600 volunteers registered for ORRCA's 27th annual whale survey this year.