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Extinct species of Hesperornithiformes
Nature
A group of flightless, foot-propelled diving birds, 1 to 2 m long, known by fossils from the Upper Cretaceous in North and South America and also central Asia. Hesperornithids lived in freshwater as well as marine environments.
Broader
Extinct megafauna
Threatened species of Birds
Value(s)
Order
Disorder
Extinction
Type
(E) Emanations of other problems