The Aviary’s sloths celebrated their birthdays with help from local families

The Aviary’s sloths celebrated their birthdays with help from local families

The National Aviary on Pittsburgh’s North Side is home to all kinds of feathered and furry friends, including three Linnaeus’s two-toed sloths.

On Aug. 21, two of these remarkable creatures celebrated their birthdays. A sloth named Vivien turned 8 years old that day, and another sloth named Wookiee turned 25 on the following day. (Our friends at the Aviary mentioned that although Wookiee is now officially old enough to rent a car, his care team isn’t concerned: Sloths aren’t known to live life in the fast lane.)

We’re told that Vivien opted to spend much of her special day sleeping in her behind-the-scenes habitat, though she celebrated with some of her favorite nutritious treats from the Aviary’s staff. And in the Tropical Rainforest habitat, Wookiee partied with a sloth-friendly, balloon-shaped gift created by staff members. It was filled with some of his favorite treats including carrots, flowers, lettuce and sweet potatoes. 

For local kids, the Tropical Rainforest habitat is a great place to see all the inhabitants in action during events like the birthday party or any time. 

“Our animal care team is very intentional about fostering opportunities for our animals to engage in their natural behaviors and for guests to see them do so. Events like our Sloth Birthday Celebration allow us to continue to do so in a fun and festive way,” says Christa Gaus, senior manager of animal programs at the Aviary.

During his birthday party, Wookiee enjoyed seeing a card made by one of his fans.

During the event, guests also had the opportunity to sign an oversized birthday card for Vivien and Wookiee, enjoy sloth-themed crafts, and take in special talks with Aviary experts.

The celebration ended with a visit from “resident artist” and fellow Linnaeus’s Two-toed Sloth, Valentino, who used his natural abilities to grasp objects, like a paint brush, to help celebrate his two friends. Valentino added his very own signature to Vivien and Wookiee’s birthday card using animal-safe paint in front of a crowd of nearly 300 kids and grownups. 

Valentino, seen here hanging around, used his talents to paint a card for his fellow sloths at their birthday party.

“From Valentino using his natural abilities to paint a birthday card, to Wookiee foraging his balloon-shaped enrichment for food, guests got a ‘front row’ look at the natural behaviors this species exhibits,” Gaus says, “alongside the personalized care given to each unique sloth, without having to journey through the jungle to see it!” 

 

Photos by Britta Moletz from the Aug. 21, 2025, Sloth Birthday Celebration courtesy of the National Aviary.

In The News

See All News

National Aviary’s ‘Jingle Bell Flock’ show brings high-flying holiday cheer | TribLive

The National Aviary on the North Side is getting into the festive spirit, starting the day after Thanksgiving with its new “Jingle Bell Flock” immersive show.

Read More »

55-plus holiday season events for kids in the Pittsburgh area | Kidsburgh

Glowing light shows, magical theatrical productions and the best music of the season are just a small part of the lineup.

Read More »

A penguin waddles into the PTL studio! | Pittsburgh Today Live

The National Aviary paid a visit to the PTL studios, and they brought Ella the African Penguin with them to tell Mikey and David about the work they're doing to protect the flightless birds.

Read More »

Best of the World 2026 | National Geographic

Steel mills once shaped outsiders’ whole impressions of Pittsburgh, but today the city increasingly defines itself by embracing the venerable cultural institutions that industrial prosperity helped build.

Read More »

Fun fall events at the National Aviary | Pittsburgh Today Live

Hear about all of the National Aviary fun happening this fall!

Read More »