Based on the clue 'because its hidden the hitou is the most prized ty...', what is the answer?

Based on the clue 'because it was slow clumsy flightless friendly to...', what is the answer? Based on the clue 'because it was waterproof this popular sticky stuf...', what is the answer? Based on the clue 'because its closest to the sun this planet is best...', what is the answer? Based on the clue 'because its durable heat resistant its long been ...', what is the answer? Based on the clue 'because its liquid flows rapidly mercury is also ...', what is the answer? Based on the clue 'because its markings resemble the patterns on an o...', what is the answer? Based on the clue 'because its meant to be served on coffee tables no...', what is the answer? Based on the clue 'because its mouth is extremely wide the swift can ...', what is the answer?