Chris Packham won't be intimidated by death threats.
The "Springwatch" presenter, who successfully campaigned for Natural England to revoke general licences needed to kill 16 species of "pest birds", received a letter earlier this week that vowed to "succeed" in a bid to kill him but he insisted the note won't stop him from continue to back the cause.
He told the Daily Mirror newspaper: "For me this is part and parcel of the process. I'm campaigning for change. It will never sway me from my cause. They can threaten to organise a car crash or poison me - it's not going to stop me. People might think this is bravado from me, but I cannot allow these sorts of things to sway me.
"There are too few people fighting to protect our environment and our landscape. And I have to carry on."
The conservationist's partner Charlotte Corney was at home when the letter arrived and his stepdaughter Megan, 23, felt "shaken" when she saw the note.
The threatening message was written in block capitals and stated: "We know where you live Packham and we will get you some way or another. We want you dead and we will succeed.
"R.T.A? Poison there are numerous ways... as long as you f***ing die thats all that matters.(sic)"
The 57-year-old star praised "brilliant" Hampshire Pollice, who have taken the letter as part of their investigation.
A force spokesperson confirmed: "We received a report of malicious communications/threats sent through the post. Enquiries are on-going."
However, Chris is not so impressed by Facebook after his address was leaked on social media and they failed to take it down.
He said: "I can't speak kindly about Facebook - they are extremely resistant to things. My address is out there and there's definitely incitement to violence."
Chris received the letter a few days after a pair of dead crows were strung up outside his gate - but he felt the "ghastly action" just proved he is making "progress" with his cause.
He said: "In a sad and perverse way this ghastly action indicates I'm making progress. I've always said I'm not here to make friends, I'm here to make a difference."