One of BBA's concerns is that cats could kill New Zealand dotterels, of which only 1700 remain.
PCP says the nearest dotterels are 2km away at Waitangi and in no danger from some elderly cats, but Mr Salmon said the birds had been seen feeding on Taiputuputu Pahi Beach about 500m from the Village Green. They fed day or night, whenever the tide was out, putting them at risk from nocturnal hunters such as cats.
"With such declining bird populations we need to do everything we can to protect them," he said.
PCP also says removing the cats will lead to an explosion in rat and mice numbers, but Mr Salmon said BBA had already offered to trap rodents around the Village Green.
BBA was calling for responsible pet ownership, not a cat ban, he said. That included neutering, microchipping, feeding cats indoors to avoid attracting stray and feral animals, and keeping cats inside at night. Containing cats on the property was ideal if people could afford it.
Bay of Islands SPCA manager John Logie said the council had so far caught and handed over two cats.
One was found to be microchipped so was returned to its owner on Saturday, but the other was believed to be a colony cat. It would be given to a local couple used to fostering cats or to an Auckland group which provided homes for strays. Either way it would live out the rest of its days in a warm, dry place.
Mr Logie said the SPCA had become involved in re-homing the colony out of concern for the animals' welfare after a number of cats were poisoned in Opua last year.
There were also concerns that existing colonies tended to attract more cats. While the cats currently in the Paihia colony were old and unlikely to be serious predators, that might not be the case for any new arrivals.