Does coevolution with a shared parasite drive hosts to partition their defences among species?

Abstract in brief

• When parasites exploit multiple host species, hosts tend to evolve different egg appearances to avoid parasitism, leading to distinct egg traits among sympatric species.
• In Zambia, warbler species parasitized by cuckoo finches show more diverse egg features compared to unparasitized warblers, and cuckoo finches tend to mimic their specific host more closely.
• Conversely, in the weaver family, parasitized species are more similar and overlapping in eggs, and cuckoo diederik prefer hosts not based on their specialization, indicating that the broader community context influences coevolution between hosts and parasites.]