High Quality Content by WIKIPEDIA articles! Julia Lorraine Hill (known as Julia "Butterfly" Hill, born February 18, 1974) is an American activist and environmentalist. Hill is best known for living in a 180-foot (55 m)-tall, roughly 1500-year-old California Redwood tree (age based on first-hand ring count of a slightly smaller neighboring ancient redwood that had been cut down) for 738 days between December 10, 1997 and December 18, 1999. Hill lived in the tree, affectionately known as "Luna," to prevent loggers of the Pacific Lumber Company from cutting it down. She is the author of the book The Legacy of Luna and co-author of One Makes the Difference. She is a vegan.