Canorous

canorous \kuh-NOR-us; KAN-or-uhs\, adjective:
Richly melodious; pleasant sounding; musical.

I felt a deep contentment listening to the meadowlark's complex melody as he sat on his bragging post calling for a mate, and the soft canorous whistle of the bobwhite as he whistled his name with intermittent lulls.
-- Donna R. La Plante, "Remember When: The prairie after a spring rain", Kansas City Star, March 16, 2003