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. 2023 May 24;10(5):221023. doi: 10.1098/rsos.221023

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© 2023 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 3. — The difference in avian eggshell surface roughness (S_a) and CA between the eggs of parasitic, hosts and non-host species. (a) There was a significantly smaller difference in mean S_a between brood-parasitic eggs and their hosts' eggs than between brood-parasitic eggs and randomly allocated non-parasitic eggs (t₁₁₈ = 3.17, p = 0.002). (b) The difference in CA of sessile water droplets between brood-parasitic eggs and their hosts’ eggs was not significantly different from that between brood parasites and randomly allocated non-host eggs (t₄₈ = 0.10, p = 0.92). Boxplots show the interquartile range and median value as a line, with whiskers encompassing values within 1.5 times the interquartile value. The distribution of data is shown in scatterplots (overlaid) and frequency plots (alongside each pairing). Each data point shows a measurement from one egg, and each egg is from a different nest.