Almost 400 different species of ground beetles occur on the Prairies, ranging in size from just a few millimetres to more than 2 centimetres. A field may contain 50 or more species, with densities ranging up to 10 beetles per square meter.
Adult Carabus nemoralis attacking a bertha armyworm caterpillar.
Photocredit - Vincent Hervet, Agriculture and Agri-Food Canada
From left to right: Bembidion quadrimaculatum, Agonum cupreum,
Pterostichus melanarius, Calosoma calidum.
Photocredit - Henri Goulet (retired), Agriculture and Agri-Food Canada