Possible Clues:

• Jumping ones
• "Twelve Days of Christmas" bounders
• Frogs and kangaroos
• Ballerinas, often
• Ballerinas, at times
• Lords in a carol, e.g.
• People born on February 29, colloquially
• They're bound to find pearls around the East
• ''Twelve Days of Christmas'' lords, e.g.
• What some lookers may become?