Nick Upton / Forest caterpillar hunter (Calosoma sycophanta) feeding on a Gypsy moth caterpillar (Lymantria dispar) it has killed in a Holm oak tree, Bacu Goloritze ravine, Baunei, Sardinia, Italy, May.

Andres M. Dominguez / Holm oak tree (Quercus ilex) in snowfall, Sierra de Grazalema Natural Park, southern Spain, January.

Juan Carlos Munoz / Iberian black pig in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Juan Carlos Munoz / Iberian black pig foraging in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Jose B. Ruiz / Holm oak tree {Quercus ilex} at night, Spain

Jose B. Ruiz / Dead Holm oak trees {Quercus ilex} in lake, at night with star trails in sky, Caceres, Extremadura, Spain

Jose B. Ruiz / Silhouette of White stork {Ciconia ciconia} on nest in Holm Oak Tree {Quercus ilex} at sunrise, Spain.

Juan Carlos Munoz / Mediterranean forest dominated by evergreen Holm oak (Quercus ilex), with deciduous trees coming into leaf in spring. Liendo Valley, Montana Oriental Costera, Cantabria, Spain. April 2019.

Juan Carlos Munoz / Dolina depression in limestone cliff, Mediterranean forest with Holm oak (Quercus ilex) forest on slopes. Cantabrian sea in background, aerial view. Liendo Valley, Montana Oriental Costera, Cantabria,...

Juan Carlos Munoz / Mediterranean forest with Holm oak (Quercus ilex) in Dolina depression in limestone cliff, aerial view. Liendo Valley, Montana Oriental Costera, Cantabria, Spain. April 2019.

Nick Upton / Gypsy moth caterpillars (Lymantria dispar) feeding on and decimating Holm oak leaves (Quercus ilex), Bacu Goloritze ravine, Baunei, Sardinia, Italy, May.

Nick Upton / Forest caterpillar hunter (Calosoma sycophanta), a ground beetle hanging upside down as it forages in a Holm oak (Quercus ilex) tree in search of Gypsy moth caterpillar (Lymantria dispar) prey, Bacu G...