Cavity-nester-parasite
Guides
Chrysis nitidula-complex
The Chrysis nitidula-complex is a species group of cuckoo wasps (family Chrysididae) characterized by metallic coloration and parasitic life history. Members of this complex are kleptoparasites that lay eggs in the nests of other solitary wasps, particularly mason wasps. The larvae consume the prey provisions intended for the host's offspring. Species within this complex are difficult to distinguish morphologically and require detailed examination for definitive identification.
Chrysis rivalis
Chrysis rivalis is a species of cuckoo wasp in the family Chrysididae. Like other members of the genus Chrysis, it exhibits bright metallic coloration and a parasitic lifestyle, laying eggs in the nests of solitary wasps or bees. The species belongs to a taxonomically challenging group where color variation and morphological similarity have historically complicated species identification. Cuckoo wasps in this genus possess armored exoskeletons and the ability to curl into a defensive ball to protect against host attacks.
Leucospis
Leucospis is a genus of large chalcidoid wasps in the family Leucospidae. Adults are typically 2–14 mm long with distinctive yellow and black coloration that resembles mason wasps. Females possess a uniquely curved ovipositor that arches over the back, used to drill into wood and reach host larvae in sealed cells. Larvae develop as ectoparasites on solitary bees and wasps, with typically only one parasite emerging per host cell. The genus has a global distribution in tropical and temperate regions.