the turquoise kingfisher
鷞 refers specifically to the turquoise kingfisher, a type of bird. The meaning is narrow and does not extend to broader concepts.
鷞 combines 鳥 (bird) with 爽, which likely contributes the sound ソウ. The character was created to name a specific bird, the turquoise kingfisher.
The left side 爽 suggests a refreshing, clear feeling, and the right side 鳥 is a bird. Picture a refreshing flash of turquoise as a kingfisher darts over clear water.
For ソウ, imagine the kingfisher's wings making a soft 'sow' sound as it glides: sow -> ソウ, like the whisper of feathers over the stream.