This behavior, called brood parasitism, is observed in fishes, frogs, and birds, with the most famous example being that of the cuckoo. Such brood parasitism has now also been observed in the ...

Paul A. Young, Facultative Parasitism and Host Ranges of Fungi, American Journal of Botany, Vol. 13, No. 8 (Oct., 1926), pp. 502-520 Free online reading for over 10 million articles Save and organize ...

Parasitoid wasps sometimes lay eggs in unsuitable host insects, a behavior that has traditionally been considered accidental.

Gradually, holoparasitic plants evolved from obligate parasites and they completely lost their photosynthesis capacity. In angiosperms, parasitic plants independently evolved 12 or 13 times.