Spider monkeys form loose groups, typically with 15 to 25 individuals, but sometimes up to 30 or 40.
Spider monkeys live in groups or bands of 10 to 40 monkeys.
Spider monkeys live in groups or bands of 10 to 40 monkeys.
Change to simpler wording: Spider monkeys form loose groups, typically with 15 to 25 individuals, but sometimes up to 30 or 40. Output: