Winter Wren (Troglodytes troglodytes)
- Species account includes a photo, identification tips, range maps, sound recordings, and a taxonomy chart.
- http://www.mbr-pwrc.usgs.gov/id/framlst/i7220id.html

House Wren (Troglodytes aedon)
- Provides a photo, range maps, and links to fact sheets.
- http://www.nenature.com/housewren.htm

House Wrens (Troglodytes aedon)
- Popularized article about this bird.
- http://www.birdwatching.com/stories/house_wren.html