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Eggshell thickness by part of egg

By Western Ecological Research Center (WERC)
Graph showing how eggshell thickness varies at different parts of a bird egg, with the thinnest parts at the ends
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Detailed Description

Mean eggshell thickness at 5 different equally spaced positions on Forster’s tern eggshells (n = 40). Eggshells studied were thicker at the egg equator than the ‘bottom’ and ‘top’ of the egg.

From:

Peterson, SP, JT Ackerman, MP Herzog, MS Toney, B Cooney and CA Hartman. 2020. Avian eggshell thickness in relation to egg morphometrics, embryonic development, and mercury contamination. Ecology and Evolution. https://doi.org/10.1002/ece3.6570

Sources/Usage

Public Domain.