Refer to the passage below and then answer the question afterwards in the same language as the passage:

Passage: At 80 to 95 cm (31 to 37 in), in length, this mid-sized vulture is about the same size as its sister species, the Indian vulture. This vulture is mostly grey with a pale rump and grey undertail coverts. The thighs have whitish down. The neck is long, bare, skinny and black. The black head is angular and narrow with the dark bill appearing narrow midway. The ear opening is prominent and exposed.

Question: what color is the vulture?
mostly grey with a pale rump and grey undertail coverts