An expert on insects has warned that a swarm of locusts found at the Plover Cove Reservoir in Tai Po could harm the ecosystem in the area.
Hundreds or even thousands of locusts have been seen around the reservoir over the past few days, with some also spotted laying eggs.
Yiu Vor, chairman of the Hong Kong Entomological Society, said on Wednesday that although most of the locusts are unlikely to survive, those who do could damage the local ecosystem.
"They may become a very strong competitor and cause an impact to local species. They may also transmit disease or parasites," Yiu told RTHK’s Candice Wong.
"Another concern is such a high quantity of locusts may attract many birds to come to eat them and it may cause a nuisance," he added.
The locusts were suspected to have been released into the wild for religious purposes.
Yiu said the government should put out a "strong and clear message" to discourage people from engaging in such release activities.