ABOUT 100 volunteers will be given a Christmas meal as a thank-you for their efforts.
Durham Wildlife Trust has arranged the event at the Slug and Lettuce, in Durham City.
Trust bosses say the group has saved the charity an estimated £259,350 this year.
Spokesman Graeme Middleton said: “The trust could not do all the work it carries out without our volunteers.
“They play a key role in the day-to-day operations.”