Three men have been arrested in the Cheddar Valley following alleged poaching in a nature reserve near Draycott.
And a fourth man faces losing a firearms certificate after being questioned by police.
The hunters are believed to have been after deer and rabbits, and are not believed to be based locally.
On Sunday, a member of the public called the police about suspected poaching at Draycott Sleights, on a reserve run by Somerset Wildlife Trust.
The reserve is home to brown hare, skylarks and lesser horseshoe bats, as well as rare plants including horseshoe vetch and bee orchids.
A spokesman for Avon and Somerset Police said: “We were called about 11.30am to an area around Draycott Sleights, and after a search, arrested three men from Bristol aged 24, 26 and 30.
“They were subsequently reported for summons, and the equipment they were found with has been seized.”
The spokesman added: “We also identified another man from Bristol suspected of poaching when we responded to a call from the Rodney Stoke area about 11.15am on January 9.
"We were told at least one shot had been fired and deer were seen running in the area.”
A 48-year-old man from Bristol is now facing a firearms licence revocation as a result.
Somerset Wildlife Trust’s reserve manager for Draycott Sleights attended the incident and provided a statement to the police.
spokesman for the trust said: “Draycott Sleights is a Somerset Wildlife Trust nature reserve.
"It is a protected site because of the wildlife found there and is also a popular place for local people and visitors alike.
"As well as being illegal this kind of activity is dangerous and distressing for members of the public.”
Sergeant Stuart Williams, of the Rural Crime Team, said: “We don’t receive many reports of poaching so being able to take action against four people suspected of it in the Cheddar area is a really good result.
“Poaching is a crime we take very seriously so we are determined that anyone we catch will face the consequences. I urge public to tell us where and when this activity is happening.”