5 year old niece had brought it to our attention yesterday (02/14/2013 around 16:00) that she said she saw some “white things” in the sky, and rushed in to tell us. We went outside, we live in an apartment complex, and looked up at the sky facing NE, and we saw some white circular shapes. First thing we told my niece is that they are birds. But we kept looking, and we saw that light was reflecting off of the shapes. If you've ever seen birds, you can tell what their color is, and light does not reflect off of them. We kept looking for a good minute, and there were literally more than one hundred. They were making fast movements, and out of nowhere, they would start disappearing in groups. And then, they were gone. It lasted about a minute and a half.Today (02/15/2013 around 16:00) we saw them again. It lasted about the same short period, and there were hundreds of them. And like the day before, they disappeared in groups. If they are birds, I have never seen birds do that. We birds fly away, as far as I've seen, you can see them leave because they usually don’t go higher. And light does not reflect off their bodies! We are going to try to record them on camera tomorrow.