The curculionidae is a family of beetles with a typical elongated face which they use to chew holes in plants for food. The curculionidae is the most diversified family of living creatures in the world. They’re collectively named weevils.
The pictures show Curculio glandium, one species of acorn’s weevil, on 2nd image on a kermes oak acorn. The adult makes a hole in the green acorns of oaks, holm oaks or kermes oaks and lays one or two eggs into it. The white and soft but provided with strong jaws larva feeds on and grows in the acorn. When the acorn ripens and falls down, the larva opens a 2 mm diameter hole to exit and it buries. The acorn’s weevils may destroy a big part of the annual acorn production. The same species can also feed on chestnuts.
[photos Florenci Vallès (1st and 2nd) and Antoni Castias (3rd)]