Animals that rely on camouflage can choose the best places to conceal themselves based on their individual appearance, our work in Zambia has found. Studying nine species of nightjar, plover and courser, we found that individual birds adjust their choices of where to nest based on their specific patterns and colours of their eggs (in the case of plovers and coursers that flee at long range) or their plumage (in the case of nightjars that sit tight on their eggs). Read more in the full paper published in Nature Ecology & Evolution, by Martin Stevens, Jolyon Troscianko, Jared Wilson-Aggarwal and Claire Spottiswoode; see also news articles about this research in The Telegraph, The Daily Mail, The International Business Times and Cosmos Magazine, and Jared’s behind-the-paper blog on the journal website.
New paper on imperfect egg mimicry
Our paper “Combined measures of mimetic fidelity explain imperfect mimicry in a brood parasite-host system” has just been published in the journal Biology Letters. This study was led by Tanmay Dixit, and carried out together with Gary Choi, Salem al-Mosleh, Jess Lund, Jolyon Troscianko, Collins Moya, L Mahadevan, and Claire Spottiswoode, as part of a collaboration between our group and Prof. Mahadevan and his lab at Harvard University. Together we combined mathematical tools and field experiments in Zambia to quantify a key difference – “squiggle” markings – between the eggs of hosts (tawny-flanked prinias) and parasites (cuckoo finches). We showed that suboptimal behaviour on the part of prinias allows cuckoo finches to get by with an imperfect copy of prinia eggs.