The vampire moths in the genus "Calyptra" can pierce mammal skin to drink blood. The capsule is capped with a calyptra. The sporangium develops within a hairy calyptra and produces spores through meiosis. The shape of the calyptra can be used for identification purposes. The sporophyte consists of a foot, stalk, a spore capsule, an operculum, and a calyptra. A calyptra is a feature of plant formation. Calyptra thalictri is a moth of the family Erebidae. Calyptra bicolor is a moth of the family Erebidae. Calyptra orthograpta is a moth of the family Erebidae. Calyptra subnubila is a moth of the family Erebidae. Calyptra pseudobicolor is a moth of the family Erebidae. Calyptra lata is a moth of the family Erebidae. Calyptra hokkaida is a moth of the family Erebidae. Calyptra parva is a moth of the family Erebidae. The calyptra usually falls off when the capsule is mature.