Rissa tridactyla: Black-legged Kittiwake
- Several photographs of birds of this species nesting on a cliff.
- http://www.birds-of-denmark.dk/Ride.htm

Rissa tridactyla (Black-Legged Kittiwake)
- Offers images and describes this species' behavior, reproduction, and physical traits.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Rissa_tridactyla.html

Red-legged Kittiwake (Rissa brevirostris)
- Image, taxonomy, breeding, diet, and identifying characteristics of this bird.
- http://www.mbr-pwrc.usgs.gov/id/framlst/i0410id.html

Black-legged Kittiwake (Rissa tridactyla)
- Physical appearance, breeding, and status in Nova Scotia. Includes bird-banding notes.
- http://museum.gov.ns.ca/mnh/nature/nsbirds/bns0180.htm