Passenger pigeon

The passenger pigeon was a type of bird found on Earth and was worth 100 points in the I-Spyder Book of Earth Creatures if it was spotted. The last passenger pigeon was an exhibit at the Museum of the Last Ones. (PROSE: The Last Dodo)

While trying to convince the Sea Devils to side with him and eradicate humanity, cited the extinction of the passenger pigeon as an example of humanity's destructive impact. (PROSE: Doctor Who and the Sea-Devils)