Narrow-Necked Cave Beetle vs Horse Stomach Bot Fly

Side-by-side species comparison

Attribute Narrow-Necked Cave Beetle Horse Stomach Bot Fly
Scientific Name Leptodirus hochenwartii Gasterophilus intestinalis
Order Coleoptera Diptera
Family Leiodidae Oestridae
Size 8-10 mm 12-16 mm
Habitat Caves Farmland
Diet Omnivores Omnivores
Regions Europe Cosmopolitan wherever horses are kept
Conservation Vulnerable Least Concern

Narrow-Necked Cave Beetle

The first cave-dwelling animal ever scientifically described, in 1832. Completely eyeless and unpigmented, with an elongated neck-like pronotum adapted to cave life.

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Did You Know?

Described in 1832, this was the first troglobite ever known to science — its discovery launched the entire field of cave biology and biospeleology.

Horse Stomach Bot Fly

A bee-like fly that glues eggs to horse leg hairs where they are ingested during grooming. Larvae attach to the stomach lining and develop for months before passing out.

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Did You Know?

Larvae survive the acidic horse stomach by secreting a protective alkaline buffer around themselves.