Woodpeckers of Europe
- Information and photographs of the ten species of the Picidae that breed in Europe.
- http://www.woodpeckersofeurope.info/

Picoides scalaris (Ladder-Backed Woodpecker)
- Species account details this bird's physical traits, food habits, and reproduction. Includes sound files.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Picoides_scalaris.html

Arizona Woodpecker (Picoides arizonae)
- Distribution, breeding habitat, conservation status, vocalizations, nesting, and behavior of this bird, also known as Strickland's Woodpecker.
- http://birds.cornell.edu/bfl/speciesaccts/ariwoo.html

Hairy Woodpecker (Picoides villosus)
- Describes the habitat, diet, and physical characteristics of this bird. Includes a photo.
- http://www.nenature.com/HairyWoodpecker.htm

Downy Woodpecker (Picoides pubescens)
- Photo, range maps, and facts about the diet and habitat of this bird.
- http://www.nenature.com/DownyWoodpecker.htm

Black-backed Woodpecker (Picoides arcticus)
- Describes the physical traits, song, range, and nesting of this bird.
- http://www.birdnature.com/bb3tw.html

Three-toed Woodpecker (Picoides tridactylus)
- Life history, range maps, photo, taxonomy, and identification tips for this bird.
- http://www.mbr-pwrc.usgs.gov/id/framlst/i4010id.html

Ladder-backed Woodpecker (Picoides scalaris)
- Facts about the migration status, breeding habitat, and diet of this species. Includes identification tips.
- http://www.mbr-pwrc.usgs.gov/id/framlst/i3960id.html

Nuttall's Woodpecker (Picoides nuttallii)
- Offers a sound file and describes the range, nesting, and diet of this bird.
- http://birds.cornell.edu/BOW/NUTWOO/

Red-cockaded Woodpecker Recovery
- Information about the endangered Picoides borealis and conservation projects from the Clemson Field Office of the U.S. Fish and Wildlife Service.
- http://rcwrecovery.fws.gov/