Aggressive-parasitism

Guides

• Sphecodes

  Blood Bees, Cuckoo Sweat Bees

  Sphecodes is a genus of kleptoparasitic bees in the family Halictidae, commonly known as blood bees due to their distinctive black and red coloration. With over 300 described species, this is one of the largest genera of cuckoo bees and has a cosmopolitan distribution across all continents except Antarctica. Females lack pollen-collecting structures and instead lay eggs in the nests of ground-nesting host bees, primarily in the genera Lasioglossum, Halictus, and Andrena. The larvae consume the host's pollen provisions and develop at the expense of the host offspring.

  kleptoparasitecuckoo-beeHalictidaeground-nesting-beesblood-beescosmopolitanhost-specificityaggressive-parasitism

• Vespula infernalis

  cuckoo yellowjacket, American cuckoo yellowjacket

  Vespula infernalis is an obligate social parasite (inquiline) that invades and usurps colonies of other yellowjacket species, primarily Vespula acadica in North America. Unlike most parasitic wasps, it exhibits intensely aggressive behavior during colony takeover, using specialized morphological adaptations including a large, heavily curved stinger to subdue host workers. The species lacks a worker caste and cannot build nests or rear its own young, instead forcing host workers to feed and care for its brood through dominance behaviors including mauling and forced trophallaxis.

  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