Prince Charles has been awarded the Teddy Roosevelt International Conservation Award for his "extraordinary" conservation leadership.
The Prince of Wales accepted the award as he attended the International Conservation Caucus Foundation dinner.
Barack Obama told Prince Charles that American people rate UK royalty above their own politicians on the royal couple's Washington tour.
Watch Prince Charles try - and fail - to get a strike on the bowling alley during a trip to a veterans' retirement home in Washington.
Charles and Camilla spent a busy first full day of their US trip visiting memorials to President Abraham Lincoln and Martin Luther King Jnr.