Wardens are needed to help instal fencing and monitor a colony of rare seabirds which are expected to arrive within weeks.
Little terns are currently flying thousands of miles from west Africa to Seaton Carew, their chosen nesting site since 2019.
Protective fencing will be put in place around the nesting ground on 1 April by Tees Wildlife Trust staff and volunteers.
Preparing for the return of the terns, warden Derek Wood called it “a very exciting time of year” and said: “With the right protection and support, we can give them the best possible chance to raise their young successfully.”