Cuckoos that care: conspecific brood parasitism in subsocial wasps

Jeremy Field, Charlie Savill & William Foster
Hosts and brood parasites are a classic example of evolutionary conflict. Parasites lay eggs in foreign nests but typically provide no further offspring care, imposing costs on hosts. In the subsocial wasp Ammophila pubescens, eggs were often replaced by unrelated foreign females, and hosts could respond by substituting new eggs of their own. Remarkably, foreign females usually provisioned the offspring in host nests, often while hosts were also provisioning. We used field data to investigate...
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