Reader Emily writes in with some interesting information regarding brown eggs and diversity.
The argument I've heard (from the environmentalists) is that you should choose brown eggs to preserve genetic diversity. The brown chickens are in the minority. The white chickens are mass produced for meat and for eggs. The argument is that if you buy brown eggs you keep up demand for these more rare chickens, and hence the diversity.
She also included a link to <a href="http://www.ithaca.edu/staff/jhenderson/chooks/chooks.html" title="The ICYouSee Handy-Dandy Chicken Chart: An Alphabetical List of More than 60 Chicken Breeds
With Comparative Information”>The ICYouSee Handy-Dandy Chicken Chart: An Alphabetical List of More than 60 Chicken Breeds With Comparative Information. Handy is right! It makes me wish I could have my own chickens here in Manhattan, but I don't think they'd do well inside an apartment. Especially not with our cat. But if I could, I'd totally get chickens that lay blue and blue-green eggs.