TOP ROW: little bronze-cuckoo, host large-billed gerygone. SECOND ROW: shining bronze-cuckoo, host yellow-rumped thornbill. THIRD ROW: Horsfield’s bronze-cuckoo, host superb fairy-wren.

the shining bronze-cuckoo (Chrysococcyx lucidus) and the little bronze-cuckoo (Chrysococcyx minutillus). Both of these species exploit the Gerygone birds of Southeast Asia, Australia, New Guinea ...

While some hosts recognize and destroy the cuckoo egg, defensive action against hatchlings has been underinvestigated. In the 13 March Nature, Naomi Langmore and colleagues at the Australian National ...