Cleptoparasite

A cleptoparasite or kleptoparasite (literally, parasite by theft) is an animal that takes prey or other food from another that has caught, collected, or otherwise prepared the food, including stored food (as in the case of cuckoo bees, which lay their eggs on the pollen masses made by other bees). The term is also used to describe the stealing of nest material or other inanimate objects from one animal by another.
The cleptoparasite operates either by obtaining prey or other objects that it could not obtain itself, or by saving the time and effort required to obtain it. However, the cleptoparasite may run the risk of injury from the victim if the latter is able to defend its prey.
Cleptoparasitism may be intraspecific (the parasite is the same species as the victim) or interspecific (the parasite is a different species). In the latter case, the parasites are commonly close relatives of the organisms they parasitize ("Emery's Rule").
===Bees and wasps===
There are many different lineages of cuckoo bees, all of which lay their eggs in the nest cells of other bees within the same family.
 Bees and their parasites
Host genus 	Parasite genus
Bombus 	Psithyrus
Anthophora 	Melecta
Amegilla 	Thyreus
Creightonella	Coelioxys
The cuckoo wasps include the family Chrysididae. Many species of Chrisidid lay their eggs in the nests of potter and mud dauber wasps; other wasps parasitise related species, as for example Polistes sulcifer which parasitises Polistes dominula.Dapporto L, Cervo R, Sledge MF, Turillazzi S (2004) "Rank integration in dominance hierarchies of host colonies by the paper wasp social parasite Polistes sulcifer (Hymenoptera, Vespidae)". J Insect Physiol 50 :217–223 These insects are sometimes referred to as kleptoparasites; other terms used (not exact synonyms) are inquiline and brood parasite.
==References==