In Great Britain and/or Ireland:
Animal / parasite
Akanthomyces anamorph of Akanthomyces aculeatus parasitises Lepidoptera

Animal / predator / stocks nest with
female of Ammophila pubescens stocks nest with larva of Lepidoptera

Animal / predator / stocks nest with
female of Ancistrocerus gazella stocks nest with larva of Lepidoptera

Animal / predator / stocks nest with
female of Ancistrocerus trifasciatus stocks nest with larva of Lepidoptera

Animal / pathogen
Bacillus thuringiensis infects caterpillar of Lepidoptera

Animal / predator / stocks nest with
female of Bethylus cephalotes stocks nest with larva of Lepidoptera

Animal / parasitoid / endoparasitoid
larva of Blondelia nigripes is endoparasitoid of larva of Lepidoptera

Animal / dung saprobe
colony of Clonostachys anamorph of Clonostachys simmonsii is saprobic in/on dung or excretions of frass of caterpillar of Lepidoptera

Animal / pathogen
Conidiobolus thromboides infects live adult of Lepidoptera

Animal / parasitoid
solitary (usually) stroma of Cordyceps gracilis is parasitoid of buried larva of Lepidoptera

Animal / parasitoid
solitary (usually) stroma of Cordyceps militaris is parasitoid of buried (usually) larva of Lepidoptera

Animal / parasitoid
gregarious stroma of Cordyceps tuberculata is parasitoid of imago of Lepidoptera

Animal / pathogen
Entomophthora aulicae infects live adult of Lepidoptera

Animal / pathogen
Erynia radicans infects live larva of Lepidoptera

Animal / predator
Himacerus apterus is predator of caterpillar of Lepidoptera

Plant / pollenated
adult of Lepidoptera pollenates or fertilises flower of Anacamptis pyramidalis

Animal / predator / stocks nest with
female of Microdynerus exilis stocks nest with larva of Lepidoptera

Animal / predator
Nabis ferus is predator of caterpillar of Lepidoptera

Animal / predator / stocks nest with
female of Odynerus spinipes stocks nest with larva of Lepidoptera

Animal / predator
nymph of Orthotylus tenellus is predator of egg of Lepidoptera

Animal / predator
adult of Pentatoma rufipes is predator of caterpillar of Lepidoptera

Animal / predator
adult of Picromerus bidens is predator of caterpillar of Lepidoptera
Other: major host/prey

Animal / predator
leaf of Pinguicula vulgaris is predator of adult of Lepidoptera
Other: minor host/prey

Animal / predator / stocks nest with
female of Podalonia affinis stocks nest with larva of Lepidoptera

Animal / predator / stocks nest with
female of Podalonia hirsuta stocks nest with larva of Lepidoptera

Animal / parasite / endoparasite
larva of Pollenia endoparasitises Lepidoptera
Other: minor host/prey

Animal / parasite / endoparasite
larva of Sarcophaga albiceps endoparasitises Lepidoptera

Animal / parasite / endoparasite
larva of Sarcophaga jacobsoni endoparasitises Lepidoptera
Other: minor host/prey

Animal / predator / stocks nest with
female of Symmorphus bifasciatus stocks nest with larva of Lepidoptera

Animal / parasitoid / endoparasitoid
solitary larva of Trichogramma brassicae is endoparasitoid of egg of Lepidoptera
Other: sole host/prey

Animal / predator
adult of Troilus luridus is predator of adult of Lepidoptera