Holly blue - Celastrina argiolus


Family: Lycaenidae.

Flight Time: March - October.

Size: 26-34mm

Altitude: 0-1900m


The Holly blue is a very widespread species, equally at home in city parks as in wilder habitats. It has a cyclical existence, every five years or so it dies out almost completely and then builds up to huge numbers by the end of the fourth year. I believe there is a parasitic wasp which preys on the larva which obviously has a similar cycle (just out of phase).


Fact File

Similar Species Foodplants Habitat Distribution


Many Holly - Ilex, Dogwood - Cornus, Ivy - Hedera


Holly blue distribution

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Early Stages




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