Boekind

Boekind was a species from the Silver Devastation.

Biology
Boekind were large, humanoid heads with numerous tendrils which terminated in round pod-like structures in place of hair. (TV: The End of the World)

Boekind could communicate telepathically and were able to speak, although they often preferred telepathy. (TV: The End of the World, New Earth, Gridlock)

Life cycle
Based on a newscast by Bad WolfTV, it was possible for a member of Boekind to become pregnant. (TV: The Long Game)

Technology
The Face of Boe at least lived permanently in a life support tank with added teleport. (TV: The End of the World, New Earth, Gridlock)

History
In the year 200,000, the Face supposedly gave birth to the Boemina. (TV: The Long Game) By the time of his hospitalisation and near-death in 5,000,000,023, however, the Face was the last of his species. (TV: New Earth) He later sacrificed himself to save the inhabitants of New New York in the year 5,000,000,053, rendering Boekind extinct. (TV: Gridlock)

Trivia
The species of the Boekind resemble 'Beholders', creatures from the Role-Playing Board Game, Dungeons and Dragons.