Mud Dauber Wasp vs Japanese Oakblue

Side-by-side species comparison

Attribute Mud Dauber Wasp Japanese Oakblue
Scientific Name Sceliphron caementarium Arhopala japonica
Order Hymenoptera Lepidoptera
Family Sphecidae Lycaenidae
Size 24-28 mm 30-40 mm wingspan
Habitat Underground Forests
Diet Nectar Feeders Nectar Feeders
Regions North America, introduced to Europe and other continents East Asia, Japan
Conservation Not Evaluated Least Concern

Mud Dauber Wasp

A slender black and yellow solitary wasp that builds tubular mud nests on walls and structures. It stocks each cell with paralyzed spiders as food for its developing larvae.

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Did You Know?

A single mud nest cell can contain up to 25 paralyzed spiders stacked inside.

Japanese Oakblue

A beautiful lycaenid butterfly with brilliant metallic blue upperwings and cryptic brown underwings. Found in oak forests where its larvae live in association with ants. Known as 'murasaki-shijimi.'

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Did You Know?

The caterpillars produce sweet secretions that attract ants, which then guard them from predators in a mutualistic relationship.