As reported in the New York Times, the vast majority of Leona Helmsley‘s $5B-$8B net worth will go to animal-related charities and trusts.
My favorite quote:
Even if the resulting total is at the low end of the estimate — $5 billion or so — the trust will be worth almost 10 times the combined assets of all 7,381 animal-related nonprofit groups reporting to the Internal Revenue Service in 2005.