Interestingly, it is the male Rheas that do most of the egg-guarding and chick-rearing. What is even more interesting is that Rheas are polygamous, and the males take more than one mate. All of his breeding partners will lay their eggs in the same place to be watched over by the male. A Rhea egg can weight 1.5lbs.
Like Ostrich, Rhea meat can be eaten, and the industry is regulated by the USDA which considers it to be "red" meat. Rhea feathers and skins are also used for various purposes, including clothing and decoration.