The "F" family is one of the most well-known and well-loved families of the Gombe Stream Research Centre. Old Flo, the matriarch of the family, made possible some of Jane Goodall's early observations of infant development and family relations. Flo and her daughter Fifi have created a large, close-knit, and high-ranking family that has given Jane and other researchers a huge amount of data. We owe a great debt of thanks to this family.