Historical clue formulations

• Rare bears — 2023-08-06
• Bei Bei and Bao Bao — 2017-10-22
• Animals with eye patches — 2010-02-14
• San Diego Zoo attractions — 2009-04-15
• Cuddly zoo animals — 2006-07-06
• Bearcats — 2006-04-02
• Bamboo lovers — 2005-10-05
• Washington zoo attractions — 2005-05-09
• Adorable "bears" — 2004-09-21
• Endangered bamboo eaters — 2004-06-02
• "Giant" animals — 2001-11-29
• Ling-Ling and others — 1998-03-27
• Some are giant — 1994-09-18