Duck eggs are bigger than chicken eggs, generally speaking. Here's a picture of the duck eggs I bought (on top) compared to the chicken eggs, size medium (bottom):
I decided to make a pair of eggs for breakfast this morning so I could easily compare the duck egg's flavor to the chicken egg's. I made them over easy, in a skillet. The chicken egg is on the left, and the duck egg is on the right:
Check out those gorgeous orange-yellow yolks! Eggs from free range birds are naturally richer in all kinds of vitamins and minerals and omega-3's because of the varied, natural diet of the birds who feed on grasses, seeds and bugs. That's why free range eggs are better for you; it is also a much happier life for the chickens and ducks who get to wander around and be birds, rather than being literally cooped up in cages or boxes in crowded, unsanitary factory "farms".
Anyway, from what I am told, duck eggs have a higher fat content in the yolk and a higher protein content in the white than chicken eggs. Because duck eggs are larger, they have more calories (180 compared to about 70-80 for a chicken egg) but when you go by weight, the calories are about the same. Here's a comprehensive nutritional comparison between the two. What stands out most to me is that duck eggs have more than double the iron content and more than FIVE TIMES the B-12 as chicken eggs, per 100 grams. That is significant! They also have more of almost all the vitamins and minerals contained in eggs. Unfortunately they also have more than double the cholesterol.
Here's my breakfast: two eggs, one slice of bacon, and half a navel orange:
I found the duck egg to taste very similar to the chicken egg. The yolk was *much* creamier/thicker than the chicken egg's. In fact it was so thick it was kind of a turn-off to me. I guess I am just used to runny yolks. I gave about half the duck egg to my dog. She gives it two paws up.
I think the somewhat richer texture and flavor of the duck egg would be excellent scrambled or made into a custard. I will try that next. Six large duck eggs cost about the same as 12 medium chicken eggs (both types are local and free range) so I will stick with buying chicken eggs in the future unless I am making something special that I want the richer duck eggs for. I do think the extra B-12 is a really good thing though, so if they go on sale I will buy more of them.
Get out there and try new, healthy things! It is fun to explore what you can find locally. Coming up soon: how I made healthier yogurt out of fresh local milk from pastured cows. I made it in my crock pot last night and it is almost ready to eat. And now I am going to ride my bike!