Good natural food sources of selenium (from WebMD and Fitday.com)

The following is extracted from
http://www.webmd.com/vitamins-and-supplements/lifestyle-guide-11/supplement-guide-selenium

Good natural food sources of selenium include:

· Nuts, like Brazil nuts and walnuts
· Many fresh and salt water fish, like tuna, cod, red snapper, and herring
· Beef and poultry
· Grains
Whole foods are the best sources of selenium. The mineral may be destroyed during processing.

The following is extracted from:
http://www.fitday.com/fitness-articles/nutrition/vitamins-minerals/10-foods-rich-in-selenium.html#b

10 Selenium Food Sources

The selenium content in foods depends on the concentration of selenium in the soil where the crops were grown. The following foods are generally considered good sources of selenium:

Brazil Nuts  
Sunflower Seeds
Fish (tuna, halibut, sardines, flounder, salmon)
Shellfish (oysters, mussels, shrimp, clams, scallops)
Meat (Beef, liver, lamb, pork)
Poultry (chicken, turkey)
Eggs
Mushrooms (button, crimini, shiitake)
Grains (wheat germ, barley, brown rice, oats)
Onions