About Cranberry Blue
A small butterfly with violet-blue upperwings in males and dark brown in females. The hindwing underside has a diagnostic metallic silver spot. It frequents boggy habitats where its larval foodplant cranberry grows.
Did You Know?
The caterpillar is tended by ants which protect it from parasitoids in exchange for sweet honeydew secretions.
How to Identify Cranberry Blue
Cranberry Blue (Plebejus optilete) belongs to the order Lepidoptera, family Lycaenidae. Adults typically measure 22-28 mm wingspan.
Cranberry Blue Habitat
Cranberry Blue is found in underground habitats, particularly across Scandinavia, Finland, northern Russia, Siberia, subarctic Japan. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.
Cranberry Blue Diet and Feeding
Cranberry Blue feeds primarily on nectar from flowers. In doing so, it acts as an important pollinator, transferring pollen between plants and contributing to plant reproduction and biodiversity.
Where Is Cranberry Blue Found?
Cranberry Blue can be found in Scandinavia, Finland, northern Russia, Siberia, subarctic Japan, where it inhabits underground environments. Its distribution is influenced by climate, food availability, and habitat suitability.
Distribution Map
Where Cranberry Blue can be found
Is Cranberry Blue Dangerous?
Cranberry Blue is generally harmless to humans. It does not bite or sting and poses no significant health risk. Like most insects, it prefers to avoid human contact and will typically flee rather than confront a perceived threat.
Cranberry Blue Role in Nature
Cranberry Blue plays an important role as a pollinator. By visiting flowers to feed on nectar or pollen, it transfers pollen between plants, aiding in reproduction and helping to maintain plant diversity. Pollinators are essential for the production of many fruits, vegetables, and wildflowers.
Seasonal Activity
Frequently Asked Questions About Cranberry Blue
What does Cranberry Blue look like?
The Cranberry Blue typically measures 22-28 mm wingspan.
Where is Cranberry Blue found?
The Cranberry Blue is found in Scandinavia, Finland, northern Russia, Siberia, subarctic Japan and typically inhabits underground environments.
What does Cranberry Blue eat?
The Cranberry Blue feeds primarily on nectar from flowers.
Is Cranberry Blue dangerous to humans?
The Cranberry Blue is generally harmless to humans. It does not bite or sting and poses no significant health risk.
What is an interesting fact about Cranberry Blue?
The caterpillar is tended by ants which protect it from parasitoids in exchange for sweet honeydew secretions.
Cite This Page
APA:
InsectDiscover. (2026). Cranberry Blue (Plebejus optilete). Retrieved from https://insectdiscover.com/insect/cranberry-blue
MLA:
"Cranberry Blue." InsectDiscover, https://insectdiscover.com/insect/cranberry-blue.