The vast majority of sexual assault convictions are male.
Thus you get wildly different graphs if you chart your information strictly from court records or a head count of convicted prisoners in the justice system than what you see from counseling and therapy researchers. Female predators may approach thirty percent. As with male predators, they go after both sexes in their victim selection.
“Female (sexual) predators may approach thirty percent”
Source?
Everything I have seen says around 10%. Around 5% of abused girls are victimized by women and 20% of boys.