If you have a smartphone, there are apps (some free, some not) such as
<https://play.google.com/store/apps/details?id=com.zellenterprises.birdsongs&hl=en>https://play.google.com/store/apps/details?id=com.zellenterprises.birdsongs&hl=en
http://www.sibleyguides.com/about/the-sibley-eguide-to-birds-app/<http://www.birds.cornell.edu/roundrobin/2011/07/22/new-500-bird-songs-free-to-play-on-mobile-devices/>http://www.birds.cornell.edu/roundrobin/2011/07/22/new-500-bird-songs-free-to-play-on-mobile-devices/
http://www.brighthub.com/mobile/google-android/articles/81099.aspx
