I tried "ethnic groups nigeria". Wolfram Alpha gave me a |-delimited string of them, Wikipedia gave me a much more comprehensive list (http://en.wikipedia.org/w

I tried "ethnic groups nigeria". Wolfram Alpha gave me a |-delimited string of them, Wikipedia gave me a much more comprehensive list (http://en.wikipedia.org/wiki/Category:Ethnic_groups_in_Nigeria http://en.wikipedia.org/wiki/Category:Ethnic_groups_in_Niger...) and each one is a hyperlink. Perhaps the author prefers to use Wikipedia for "facts and trivia", but I find myself enjoying the site for providing a detailed and thorough introduction to almost every non-trivial topic.