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FILE - A rhesus macaque monkey rests his chin on a water pipe on Cayo Santiago, known as Monkey Island off the eastern coast of Puerto Rico, Tuesday, July 29, 2008. (AP Photo/Brennan Linsley, Fiel)

FILE - A rhesus macaque monkey rests his chin on a water pipe on Cayo Santiago, known as Monkey Island off the eastern coast of Puerto Rico, Tuesday, July 29, 2008. (AP Photo/Brennan Linsley, Fiel)

In this Friday, Nov. 10, 2017 photo, a rhesus macaques monkey observes kayakers as they navigate along the Silver River in Silver Springs, Fla. (AP Photo/John Raoux, File)

In this Friday, Nov. 10, 2017 photo, a rhesus macaques monkey observes kayakers as they navigate along the Silver River in Silver Springs, Fla. (AP Photo/John Raoux, File)

FILE - In this May 13, 2019, photo, River, left, and Timon, both rhesus macaques, sit in an outdoor enclosure at Primates Inc., in Westfield, Wis. (AP Photo/Carrie Antlfinger, File)

FILE - In this May 13, 2019, photo, River, left, and Timon, both rhesus macaques, sit in an outdoor enclosure at Primates Inc., in Westfield, Wis. (AP Photo/Carrie Antlfinger, File)