How multiple species affect each other’s ever-evolving eggs

May 15, 2017

Brood-parasitic birds lay eggs that mimic those of other species, to trick hosts into incubating their egg and raising their chick. Hosts often fight back by evolving egg colours and patterns that look different from those of their parasites, making an impostor easier to spot. In this study, we tested whether natural selection also drives hosts to evolve eggs that look different from those of other hosts, to avoid being susceptible to their neighbour’s specialist parasites when several host species live side by side. Using data from Major John Colebrook-Robjent‘s wonderful egg collection, we find evidence for this in the hosts of African brood-parasitic birds, which have evolved astonishingly diverse eggs. Read more in the full paper is published in Proceedings of the Royal Society of London B, by Eleanor Caves (former MPhil student), Martin Stevens and Claire Spottiswoode; see also a news article about this research in The Economist.

News

Jess Lund awarded an R. C. Lewontin Grant from the Society for the Study of Evolution

The Society for the Study of Evolution has awarded Jess Lund an R. C. Lewontin Graduate Research Excellence Grant, which will enable her to expand her investigations into the fascinating lives of honeyguides. This grant is awarded to students early in their PhD programmes to assist them in enhancing the scope of their research. Thank you to the SSE for their generous support of our work!

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New paper on eggshell surface properties

Stephanie McClelland’s paper entitled “Eggshell composition and surface properties of avian brood-parasitic species compared with non-parasitic species” has been published in the journal Royal Society Open Science. This study measured structural properties of the eggshells of brood parasites and their hosts around the world. The study found that…

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