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Researchers ponder the shape of birds' eggs

Date:
February 23, 2017
Source:
Wiley
Summary:
The shape of birds' eggs varies considerably, for reasons that are unclear, outlines a new report.
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This is a guillemot egg showing the typically pointed shape.
Credit: TR Birkhead

The shape of birds' eggs varies considerably, for reasons that are unclear. The peculiarly elongated and pointed shape of the Common Guillemot's egg is thought to prevent it from rolling off the narrow cliff ledge it is laid on, but new research suggests instead that the shape has more to do with providing resistance against impacts and protection from fecal and other contamination.

"I have studied guillemots for over forty years and have never been convinced by the rolling explanation. It has been exciting coming up with new ideas and testing them," said Dr. Tim Birkhead, lead author of the Ibis study.


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Journal Reference:

  1. Tim R. Birkhead, Jamie E. Thompson, Duncan Jackson, John D. Biggins. The point of a Guillemot's egg. Ibis, 2017; DOI: 10.1111/ibi.12458

Cite This Page:

Wiley. "Researchers ponder the shape of birds' eggs." ScienceDaily. ScienceDaily, 23 February 2017. <www.sciencedaily.com/releases/2017/02/170223092149.htm>.
Wiley. (2017, February 23). Researchers ponder the shape of birds' eggs. ScienceDaily. Retrieved May 25, 2017 from www.sciencedaily.com/releases/2017/02/170223092149.htm
Wiley. "Researchers ponder the shape of birds' eggs." ScienceDaily. www.sciencedaily.com/releases/2017/02/170223092149.htm (accessed May 25, 2017).

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