AP - While migratory bird routes may be a lot like highways in the sky, they aren't riddled with guardrails and perilous hairpin turns demanding high levels of sobriety.{br}{br}View the Entire Article (http://us.rd.yahoo.com/dailynews/rss/science/*http://story.news.yahoo.com/news?tmpl=story2&u=/ap/20050218/ap_on_sc/bird_breathalyzer){br}