Snakes and birds don't have a lot in common but what they do share is the production of eggs. If you find some, these tips can help you identify the source.

Take a mama salmon, for example. It lays thousands of eggs at a time which the males fertilize thoroughly. The salmon packs each egg with more yolk compared to an urchin, that means more proteins, ...

Across the animal kingdom, eggs can appear green, brown, pink, and even bright blue depending on the species that lays them.