Two feral dogs have been spotted on the Ramsar protected island in as many weeks, prompting authorities to keep an eye on the situation.

“At the moment Corrie Island is being monitored for feral species and the impact or potential impact they may cause. Which includes looking for signs of wild dogs and foxes like tracks to determine how to approach the situation,” a spokesperson for the National Parks and Wildlife said.

“What has happened in the past with wild dogs in areas like Yaccaba, National Parks undertook a joint baiting program with council to control the population.”

Members of the Myall River Action Group say the dogs have gained access via the original channel, which the animals are able to cross on at low tide.

“It’s a shame these animals will be destroyed when they’ve basically been given an open invitation to the island and baiting them is just a stopgap measure,” spokesman Gordon Grainger said.

“The only remedy as we see it would be to keep the original channel deep and while dingoes can swim it will definitely minimise their impact.”

Mr Grainger said unless the river is dredged the island’s native species will be killed off.