The shell must be strong enough to support the egg’s weight and protect the embryo, but thin enough for the chick to break through when hatching.
As size increases, the weight grows cubically (volume), but shell strength only increases quadratically (surface area), so there’s a point where the shell would have to be too thick to hatch from.
The distance from the shell to the center increases.
Oxygen diffusion becomes inefficient, and the embryo could suffocate.
Larger eggs are harder to keep at a uniform temperature.
Birds incubating the eggs would need to generate and distribute more heat, which is physically demanding.

[–] tamal3@lemmy.world 3 points 1 day ago (1 children)

Any info on why both are GREEN? That's unexpected. Camouflage, maybe?

[–] dependencyinjection@discuss.tchncs.de 6 points 1 day ago* (last edited 1 day ago) (1 children)

I am not an eggspert but after a quick search it seems many bird eggs are green in colour due to a pigment called biliverdin.

Interestingly verde is green in Spanish.

[–] bdonvr@thelemmy.club 2 points 1 day ago* (last edited 1 day ago)

A lot of biological and other scientific terms are actually Latin or some mix of it. Bili means "Bile". Sources say "verd" in this case comes from French verd an old way to say green (Modern: vert/verte), but in any case the French words still derive from Latin viridis.

Spanish, French, Italian, Portuguese, Romanian, Catalan, and a few other minor languages are all descendants of Latin collectively called the Romance Languages. Speakers of one can often understand a lot of any other of the languages or Latin. Not completely mind you, but enough to get some meaning. Spanish speakers can understand a lot of written Portuguese (but not so much spoken due to pronunciation differences), Italian and Spanish speakers can almost have a conversation spoken or written. Portuguese/Italian/Spanish speakers will have a harder time with French though, they will recognize many written words but not enough to really call it totally understandable, and almost nothing spoken. Etc, etc.

[–] whoisearth@lemmy.ca 2 points 1 day ago (1 children)

Last 3 points millions of years ago the planet was much warmer with a lot more oxygen so for dinosaurs they would be moot.

[–] dependencyinjection@discuss.tchncs.de 2 points 1 day ago (1 children)

Even with it being much warmer I believe it would still be difficult to keep at a uniform temperature.

[–] whoisearth@lemmy.ca 1 points 1 day ago (1 children)

Maybe it wasn't as difficult as we think?

[–] victorz@lemmy.world 4 points 1 day ago

Maybe nothing is 🤯