Mealworm Beetle - Tenebrio molitor


Tenebrio molitor is a species of darkling beetle. Length 12 to 18 mm, width 4.5 to 6 mm. Usually dark brown to almost black but light brown specimens are not uncommon. Entire upper surface punctate and somewhat shining.

Identification difficulty

Often found around houses where it is attracted to lights.

When to see it

May to September.

Life History

The larvae are the familiar mealworms that are fed to birds.

UK Status

Widespread and previously fairly frequent in England, but possibly declining.

VC55 Status

Occasional in Leicestershire and Rutland. There were a total of 22 VC55 records for this species up to March 2015.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map