Nest parasitism is the act of laying eggs in the nest of another species, often resulting in the death or abandonment of the host's offspring. Other synonyms for this behavior include brood parasitism, obligate brood parasitism, and conspecific brood parasitism. Brood parasitism is common among certain bird species, such as cuckoos, cowbirds, and some finches. The act of parasitism allows the parasitic species to conserve energy and resources while still propagating their own genes. However, it can have negative effects on the host species, as they may suffer reduced reproductive success or increased predation risk as a result.