Quails are a little different than a chicken. Quail eggs are considered a delicacy. They can be used raw, in smoothies or cooked. It's yolk is extra rich and creamy. Compared to a chicken egg with equivalent weight, the quail egg contains more vitamin and nutrients.
A single quail egg provides a significant chunk of your daily vit. B12, selenium, riboflavin, and choline needs, along with some iron with only 14 calories. (Source from Healthline).
It has been noticed, many people with egg allergies do not have quail egg allergies (please check with your doctor before eating it).