But despite their shared function, they evolved different shapes.” Not all eggs are like the ones at the grocery store; the vast landscape of bird eggs actually spans a much wider range of shapes.

It’s a mystery that goes back to the days of Aristotle, flummoxing biologists and mathematicians for centuries: Why do birds’ eggs come in so many different shapes and sizes?

Ever wonder why eggs are shaped like eggs? Scientists say they’ve figured it out. June 22, 2017 More than 8 years ago Summary ...

Could the shape of eggs be related to whether the birds are strong fliers? That's one of many theories.

Over the years, scientists have learned about literally thousands of different bird species, and each one sports a distinctive beak shape. But why do bird beaks come in so many different shapes and ...

An analysis of nearly 50,000 bird eggs finds a link between a species’ egg shape and flight ability.

The reason is that the wing shape reflects the bird's life style, Jonathan Kennedy elaborates; - Some birds have long projected wings specially evolved to travel long distances.

A group of starlings put on an impressive display during a murmuration in Kettering, Northamptonshire. Roland James, 40, captured the spectacular moment they formed a bird shape.

Many different theories exist as to why the shape of bird eggs varies so much across species, and now, new research yields evidence that variable egg shape is driven by unique flight adaptations.