CHICAGO (CBS) — Some of the animals at Brookfield Zoo are celebrating St. Patrick’s Day with shamrock-shaped and green treats.

Snacks for camels, lemurs, orangutans and gorillas consist of, according to Brookfield Zoo, a “complete-balanced biscuit and gelatin.”

Two of the gray seals, Boone and Lily, munch on gelatin goodies.

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Bornean orangutan Sophia and her daughter Heidi devour shamrock-shaped treats.

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Ramses, a ring-tailed lemur, eyes his snack.

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(Photo credit: Jim Schulz/Chicago Zoological Society)