Coccinella septempunctata “Seven-spotted Lady Beetle” Coccinellidae
Drinking Horse Mountain, Bozeman, MT
June 3, 2015
This species has been repeatedly introduced to the US as a biological control agent to manage aphid outbreaks. It is reportedly out-competing many native species in our area, but still has managed to become the official state insect of Delaware, Massachusetts, New Hampshire, Ohio, and Tennessee. This individual was likely released as part of an ongoing Fish and Wildlife Service biological control project in the Drinking Horse Mountain area which has also involved intense invasive plant control (with goats!) in the past.
Anatis rathvoni “Rathvon’s Giant Lady Beetle” Coccinellidae
Great Burn, Lolo National Forest, MT
July 10, 2015
These massive (10mm) ladybugs are endemic to the PNW and are normally found in pines and other conifers where they voraciously consume aphids, caterpillars, and other small, fleshy-bodied herbivores. Their elytra vary in color from yellow, pale brown, to brown-red, darkening with age. Rathvon’s Giant Ladybird Beetles are named for a relatively obscure 19th century entomologist, S. S. Rathvon from Pennsylvania, who was one of North America’s first entomologists dedicated to educating the public about their local beneficial and pest-insects. Learn more about his life here.