The breeding behavior of eight species in "Indicator" and "Prodotiscus" is known. They are all brood parasites that lay an egg in a nest of another species. Most prefer hole-nesting species, often the related barbets and woodpeckers, but "Prodotiscus" parasitizes cup-nesters such as white-eyes and warblers. Honeyguide nestlings have been known to throw out their host's chicks from the nest. They have hooks on their beaks with which they puncture the hosts' eggs or kill the nestlings.