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CORRECTS DATE TO AUG. 8, 2024 - This photo, provided by the Rosamond Gifford Zoo, in Syracuse, NY, Thursday, Aug. 8, 2024, shows a pair of half-sister, baby patas monkeys born at the zoo weeks apart in April and May 2024, that are are being hand-raised by keepers after their mothers showed a lack of maternal instinct, a zoo official said Thursday. (Rosamond Gifford Zoo via AP)

CORRECTS DATE TO AUG. 8, 2024 - This photo, provided by the Rosamond Gifford Zoo, in Syracuse, NY, Thursday, Aug. 8, 2024, shows a pair of half-sister, baby patas monkeys born at the zoo weeks apart in April and May 2024, that are are being hand-raised by keepers after their mothers showed a lack of maternal instinct, a zoo official said Thursday. (Rosamond Gifford Zoo via AP)

CORRECTS DATE TO AUG. 8, 2024 - This photo, provided by the Rosamond Gifford Zoo, in Syracuse, NY, Thursday, Aug. 8, 2024, shows a pair of half-sister, baby patas monkeys born at the zoo weeks apart in April and May 2024, that are are being hand-raised by keepers after their mothers showed a lack of maternal instinct, a zoo official said Thursday. (Rosamond Gifford Zoo via AP)

CORRECTS DATE TO AUG. 8, 2024 - This photo, provided by the Rosamond Gifford Zoo, in Syracuse, NY, Thursday, Aug. 8, 2024, shows a pair of half-sister, baby patas monkeys born at the zoo weeks apart in April and May 2024, that are are being hand-raised by keepers after their mothers showed a lack of maternal instinct, a zoo official said Thursday. (Rosamond Gifford Zoo via AP)