Why Do Bird Eggs Have Different Shapes? Look to the WingsIn the most comprehensive study of egg shapes to date, scientists say that the best predictor of long or pointy eggs is a bird’s flying ability. Trilobites By STEPH YIN JUNE 22, 2017 The New York Times Owls’ are spherical, hummingbirds’ are elliptical and sandpipers’ are pointy.
All bird eggs have the same function — to protect and nourish a growing chick. But they come in a brilliant array of shapes. This variety has puzzled biologists for centuries. Now, in the most comprehensive study of egg shapes to date, published Thursday in Science, a team of scientists seems to have found an answer. The researchers cataloged the natural variation of egg shapes across 1,400 bird species, created a mathematical model to explain that variation, and then looked for connections between egg shape and many key traits of birds. On a global scale, the authors found, one of the best predictors of egg shape is flight ability, with strong fliers tending to lay long or pointy eggs. “This paper is remarkable because it creates a wonderfully unified theory for the variety of egg shapes we see in nature,” said Claire Spottiswoode, a bird ecologist at the University of Cambridge and the University of Cape Town who did not participate in the research.
2 Comments
7/20/2017 09:05:01 am
This blog has very good information about birds. A good to read.
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11/1/2018 09:23:02 pm
I think that this is a very interesting question. First of all, I want to applaud you for your keen observational skills. Most people would not have noticed that the eggs that each bird layout are not the same in terms of size. Well, I cannot say that I am an expert of sorts, especially in the field of science, however, what I can say is that this is perhaps similar to how our mothers give birth to different babies.
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January 2018
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