Skutter
The skutters are motorised service and maintenance robots that stand at around two to three feet tall. They have a single limb which ends in a three-clawed hand with an electronic eye. Their claws are usually closed in such a way that they appear to have a beak.
The duties of the skutters are to perform menial tasks around the ship, such as cleaning the hundreds of miles of floors on the ship, or painting the corridors different shades of grey.
The skutters are unable to speak (except with bleeping noises), but can usually make their feelings clear. Their hands are particularly well designed for giving 'up yours' with one or two digits.
In May 2107 the robot Mk9 malfunctioned, and lead the skutters in a fit of rage to attack the other crewmembers. This lead to many skirmishes and a large bloody battle in the Hangar bay where many of Blue Dwarf's skutters were destroyed. The final command given by Mk9 before he was fully repaired and made sane again was for all the skutters and Peewee robots to converge on the Blue Dwarf's Main Reactor and attack it. The crew of the Blue Dwarf averted disaster by engaging the Wormhole Drive, causing the Main Reactor to swell and engulf the robots. From then on, the Blue Dwarf didn't have any skutters on-board for a month.
http://en.wikipedia.org/wiki/Skutter#The_Skutters