Possible Clues:

• Bird left at front of animal sanctuary
• Something one may be as happy as
• “The ___ Ascending” (Ralph Vaughan Williams composition)
• Amusing adventure
• A bit of fun, taking sailing vessel on lake
• Happiness symbol
• ''Happy as a'' songbird
• Winged symbol of joy
• Horned ___ (bird)
• Dido? Singer producing high notes