The Shansheeth were a species known as galactic undertakers.
The Shansheeth looked like Earth vultures. They had beaked faces and hunched shoulders, and their necks protruded from the middle section of their shoulders, the base ringed with white feathers. They could project an energy beam from their hands offensively. (TV: Death of the Doctor)
The Shansheeth travelled through space to return lost heroes to their kin. They were grouped into "tribes" and were led by the Wide Wing of the High Shansheeth Nest. Shansheeth wore robes and had small jewels on their forehead. (TV: Death of the Doctor)
In 2010 a rogue tribe of Shansheeth, the Claw Shansheeth of the 15th Funeral Fleet, lured the Eleventh Doctor to the Crimson Heart, where they stole his TARDIS, intending to use it to avert death on a historical scale. They were unable to get his key to get in, so they planned to use a memory weave on his companions, using their minds to create a copy of the key.
They came to Earth, claiming to have found the Doctor's body and holding a funeral. When Sarah Jane Smith and Josephine Jones came to the funeral, the Shansheeth memory weave found that they had the strongest memories and they planned to use them to create the key. Though the Doctor escaped Crimson Heart, he could not prevent them from being captured. Sarah Jane and Jo overloaded the memory weave by recalling all their memories of the Doctor. The Claw Shansheeth were killed when the memory weave exploded after overloading. The Wide Wing of the High Shansheeth Nest later apologised for the rogue group. (TV: Death of the Doctor)
Sarah Jane once used her monster morpher to momentarily morph herself into a Shansheeth, then she reverted herself and followed the Bannerman Road gang onto their new adventure. (GAME: Monster Morpher)