An egg shortage caused by bird flu, which has impacted poultry farms and led to the mass culling of flocks, is causing supermarket shelves to run bare and prices to rise across several US states. "They are expensive, too expensive," one resident in Miami tells AFP. "Poor people can't buy eggs," another resident says, adding, "We are in a country like the United States, where everything is supposed to go down [prices], but everything is going up." IMAGES AND SOUNDBITES