FRES[1] (born 1954, in Glasgow, Scotland)[2] is a British entomologist, author, academic, television presenter and explorer.

He won Earthwatch's "Irreplaceable – The World's Most Invaluable Species" debate, broadcast on BBC Radio 4, in 2008[14] and he is a lecturer on board Cunard ships.

[15] In 2017 he gave the Royal Entomological Society's Verrall Lecture speaking on 'Tales from television: an entomologist's perspective'[16] He is a patron of the charity Wildscreen,[17] of the Bees, Wasp and Ants Recording Scheme and of the Alderney Records Centre;,[18] he is president of Dorset Wildlife Trust[19] and is a Global Ambassador for Earthwatch.

[26] In October 2017, McGavin presented a one-off BBC documentary Oak Tree: Nature's Greatest Survivor.

[31] In 2024, McGavin made a guest appearance in the promotion leading up to the release of Helldivers 2, playing a scientist in a comedic advertisement for the game.

[32] McGavin was the guest on the long-running Desert Island Discs a BBC Radio 4 programme on 7 February 2021, hosted by Lauren Laverne, where he talked about the challenge he faced in his childhood with a severe stutter.