The Southern Gatekeeper (Pyronia cecilia) looks a lot like the Gatekeeper (Pyronia tithonus), but unlike the Gatekeeper, the Southern Gatekeeper has marbled hind wings and no small white spots on the underside of the hindwings.
The Southern Gatekeeper occurs in Southern Europe and North Africa, while the Gatekeeper is found across Europe.

1st, 2nd & 3rd photo: Embalse de la Albuera, Trujillo area, Cáceres, Extremadura, Spain, 9 June 2024
4th & 5th photo: Monfragüe National Park, Extremadura, Spain, 11 June 2024