That web site is all flashy presentation, I couldn't tell if there was any actual information hidden amongst the animations.
TLDR anyone?
TLDR anyone?
OK, your idea is parent optimized for physical characteristics of progeny, or in this case, the parent is formed by the egg, not the egg by the parent?
In this article, your point would be, because of laying conical eggs, certain species of birds were able to nest on cliffs. So their eggs not rolling made them cliff dwellers?
And similarly, elliptical eggs optimized their mothers for faster flight?
Not sure. Put like that, I'm thinking it's reasonable the parent trying to roost on the cliff came first.
If the eggs are layed on cliffs, then they are conical so they don't roll and fall.
And the thickness of the inner egg membrane plays a role in defining the shape while it's being pressed out.
> What’s the link between flying and egg shape? Birds have a streamlined body plan, and—especially in stronger fliers—their organs are squashed and minimized.