To make a world realistic, writers have to learn about all kinds of crazy ish.
Are there birds that can fly backwards?
Which bugs are first to arrive at a dead body?
I write stories about city-living and the people who inhabit that world. Some of those people are gang members. Since I no longer personally know gang members, I turn to other resources for information. Which leads me to:
Yes, there are meanings behind those tattoos and Gawker posted a story about the comprehensive document Canadian border officials keep on gang-related tats!
Eight-plus pages of goodness, from Crips to Russian gangs.
Click away, my friends, and read!
By the way, hummingbirds are the only birds that can fly backwards, Play-Dough was originally created to clean wallpaper, and blow flies come first.