Duck eggs are fresh unwashed/unrefrigerated.
 
Allergic to chicken eggs? Duck eggs might be just what you need.  Compared to chicken eggs, duck eggs have more magnesium, calcium, iron, vitamin B12, vitamin A, thiamin, etc. per 100 grams. They are a great source of omega 3 fatty acids, which are vital for a normal human metabolism. Duck eggs are an excellent source of selenium, providing almost half of the daily value in one egg. There are 8 vitamin Bs and duck eggs contain all of them. Duck eggs also contain vitamin D, the 'sunshine vitamin'. If you're looking to add more protein to your diet, an average chicken egg contains 6.28 grams of protein, while an average duck egg contains 8.97 grams of protein. Source: WebMD