A bird net is between two trees, and the bird touching the net will be entwined by the net until death. The net is spotted in Jiaxing, east China's Zhejiang province, on October 17, 2016. [Photo: thepaper.cn]

More trammel nets capturing birds are found in east China's Zhejiang province, after a 20,000-meter long similar net found in north China earlier this month.

The Nanbei Lake in the city of Jiaxing has reportedly become a hell for birds after bird hunters put their eyes in the former heaven for birds.

Reports from thepaper.cn found massive nets around the lake area with more in the surrounding mountains.

Some of the nets have been dismantled by the local authorities where they found protected species such as Eurasian hobby and scaly thrush.The report quotes a volunteer saying that the overwhelming amount of nets have made them "lose faith", as new nets were set up soon after they took down old ones.

These nets are very cheap and easy to buy on the markets, says the volunteer.

Earlier reports said huge profits are driving these illegal hunters. The hunting can generate as much as 20,000 yuan per season, says a Xinhua report.

Most of the birds will be shipped south to dealers who will then sell them as pets on bird markets or to illegal eateries that specialized in wild animals.

On Wednesday, China's State Forestry Administration launched a 40-day "net-removing" campaign, in a bid to crack down the illegal bird hunting and protect migrant birds.

Authorities will also keep a close eye on restaurants, bird markets and transportation to break the profit chains.

In September, a trammel net stretching over 20,000 meters were found in north China's Tianjin and Tangshan area, causing the death of over 5,000 birds including a number of protected species.

The story triggered a wide range of attention in the Chinese society, calling for protection of wildlife.