Bat Fly vs Gold-tailed Ruby Wasp

Side-by-side species comparison

Attribute Bat Fly Gold-tailed Ruby Wasp
Scientific Name Penicillidia conspicua Chrysis fulgida
Order Diptera Hymenoptera
Family Nycteribiidae Chrysididae
Size 2-5 mm 7-12 mm
Habitat Caves Underground
Diet Parasites Parasites
Regions Europe, Asia, Africa Central Europe, Southern Europe, Western Europe
Conservation Least Concern Least Concern

Bat Fly

A bizarre wingless fly that lives exclusively as an ectoparasite on bats. It has lost its wings entirely and scurries through bat fur like a spider.

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Did You Know?

These flies have evolved to look and move like spiders, having completely lost their wings and flattened their bodies for life in bat fur.

Gold-tailed Ruby Wasp

A dazzling metallic wasp with a bright green head and thorax and a golden-red abdomen. It is a brood parasite of potter wasps and mason wasps.

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Did You Know?

Its armoured exoskeleton is so tough that host wasps cannot sting through it.