Four cuckoo species exploit the monsoon breeding pulse

July 6, 2026Narmada Valley dry deciduous forests

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Four cuckoo species converged here in late June and early July—a striking ecological moment that reveals the precision of brood parasitism timed to monsoon rhythms. , , , and were recorded across the region during this brief window. Each species has evolved to time its breeding to match the nesting peak of its specific host birds, a behavioral synchronization refined over millennia.

The Hawk-Cuckoo's call—a loud, whistled "brain-fever"—has been a signature of the Deccan monsoon rains for centuries, its arrival marking the start of the wet season in local tradition. This year it shared the stage with three companions, each pursuing the same parasitic strategy but targeting different host species. The simultaneous presence of all four speaks to the robustness of the monsoon pulse itself, the surge of insect availability and nesting activity that draws these specialized brood parasites to the region year after year.

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