The family Lasiocampidae comprises the eggar moths, of which 10 are resident species in Great Britain, one probably extinct and one probably an immigrant:

• Poecilocampa populi, December moth — throughout
• Trichiura crataegi, pale eggar — throughout (vulnerable^[1]) ‡*
• Eriogaster lanestris, small eggar — south, central (Nationally Scarce B)

• Malacosoma neustria, lackey — south, central (common) and north (scattered) (Vulnerable^[1]) ‡*
• Malacosoma castrensis, ground lackey — south-east, south-west (Nationally Scarce A)
• Lasiocampa trifolii, grass eggar — south, west-central (Nationally Scarce A)

• Lasiocampa trifolii f. flava (pale grass eggar) — south-east (Red Data Book)

• Lasiocampa quercus, oak eggar

• Lasiocampa quercus quercus — south, central
• Lasiocampa quercus f. callunae (northern eggar) — north, west

• Macrothylacia rubi, fox moth — throughout
• Dendrolimus pini, pine-tree lappet — rare immigrant
• Euthrix potatoria, drinker — south, central, north-west
• Phyllodesma ilicifolia, small lappet — presumed extinct

• Gastropacha quercifolia, lappet — south, east-central

Species listed in the 2007 UK Biodiversity Action Plan (BAP)^[2] are indicated by a double-dagger symbol (‡)—species so listed for research purposes only are also indicated with an asterisk (‡*).