Aquatic, Flightless Bird
Puzzle 2 of Tolkien Universe Medium Pack
Question is: Aquatic, Flightless Bird
and the answer is: PENGUIN
Word Meaning:
PENGUIN — Any of several flightless sea birds, of the family Spheniscidae within the order Sphenisciformes, found in the Southern Hemisphere, marked by their usual upright stance, walking on short legs, and (generally) their stark black and white plumage.
Definitions from Wiktionary.