Chlidonias niger (Black Tern)
- Photos of this bird and its nest, physical characteristics, food habits, reproduction, and conservation status.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Chlidonias_niger.html

Black Tern (Chlidonias niger)
- Details this bird's breeding habits, migration, and physical appearance. Includes illustrations.
- http://www.birds.cornell.edu/BOW/BLKTER/