Calocoris affinis is a species of insect in the subfamily Mirinae of the family Miridae that can be found everywhere in Europe except for Switzerland and Greece.

[1] It is distributed in most of Europe, including Denmark, Germany, Turkey, Serbia, Finland, Spain, Portugal and Italy.

[2] It is not found in Switzerland and Greece due to the mountainous terrain.

It lays its eggs in the fall, while hatching in the summer from June to August.

[2] Its diet consists of Urtica dioica juices, Heracleum sphondylium nectar, and Centaurea jacea nectar.