description Holly Blue Overview
The holly blue (Celastrina argiolus) is a small butterfly found across Europe and temperate Asia, easily recognized by the pale silvery-blue upperwings of the male. It is one of the most familiar blue butterflies in the Lycaenidae family and frequently appears in gardens and woodland edges. Females lay eggs on holly in spring and ivy in summer, allowing two broods per year to use different host plants. Caterpillars are attended by ants, a relationship common among lycaenids.
help Holly Blue FAQ
What is the scientific name of the holly blue butterfly?
The holly blue is scientifically known as Celastrina argiolus. It belongs to the Lycaenidae family of small butterflies.
How can you identify a male holly blue?
The male usually has pale, silvery-blue upperwings that are visible when the wings are open. The species is small and is often seen in gardens, woodland edges, and other habitats with host plants.
Where does the holly blue live?
Holly blues occur across Europe and temperate parts of Asia. They are familiar in gardens and woodland habitats rather than being restricted to one rare mountain region.
Why is the holly blue associated with holly and ivy?
The butterfly's common name reflects important larval food plants, including holly and ivy in parts of its range. Adults feed on nectar, while caterpillars depend on suitable host plants during their development.
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