 If "Gigantoraptor erlianensis" is a caenagnathid, then it would represent far and away the largest member of the group, measuring up to 8 meters in length and weighing up to 1.4 tons.Their beaks also show considerable variation; that of "Caenagnathasia" is relatively short and deep, while that of "Caenagnathus" is long and shovel-shaped.This variation in size and beak shape suggests that caenagnathids evolved to exploit a range of ecological niches.