This is a neat map that shows the 2014 migration northward of the Ruby-throated hummingbirds into the US and Canada. Hopefully most of them survived the late freezes and storms we had this year. I saw one in our backyard in the middle of April and I think we had a couple of cold snaps after that.
Screen shots are below, but do visit the link as the FAQs are interesting as well! http://www.hummingbirds.net/map.html