Izzy, the Smithsonian National Zoo’s seven-year-old golden lion tamarin, died giving birth to her two offspring earlier this month.

Both of her babies also died, according to the Zoo.

We're sad to share that 7 y.o. golden lion tamarin Izzy died while giving birth overnight Aug. 9. She was pregnant with 2 offspring; sadly, neither survived. Keepers fondly remember Izzy for her bold nature + knack for solving enrichment puzzle feeders + toys. She will be missed. pic.twitter.com/NefoEPoNmU

— National Zoo (@NationalZoo) August 18, 2020

In an Instagram post, the Zoo says that keepers had been monitoring Izzy for weeks and did not notice any abnormal behavior prior to her death. The average life expectancy for a golden lion tamarin kept in human care is about eight years, though they can live up to 20 years.

Izzy came to the National Zoo from California in 2016. In 2018, she gave birth to a baby, Carolina, who recently moved to Prospect Park Zoo in New York.

Keepers say she will be remembered for her “bold and fearless nature,” and her cunning ability to steal food from her roommate, Vlad, a two-toed sloth. She was also known to be a speedy problem solver — often the first to figure out feeder puzzles and toys.

The sad news comes as the Zoo (and the city) hopefully await arrival of a new cub from giant panda Mei Xiang.