It's spring, and we all know that means baby animals. Denver Zoo announced the birth of "Penny," a female, red ruffed lemur, which is classified as an endangered species, on May 18. A little farther south, Cheyenne Mountain Zoo recently introduced a new baby giraffe, which is also an endangered species. The calf is the 199th successful giraffe birth at the zoo since 1954. Check out these adorable animals you can see around Denver right now! Photos courtesy of Cheyenne Mountain Zoo and Denver Zoo