Ernie, along with 25 other squirrel monkeys, was retired from nicotine studies and found a new home at Jungle Friends. Their arrival made history as the first troop to be retired from the FDA, an event celebrated and reported by CNN. Ernie shares a special bond with his twin brother, Burt. Ernie tends to be shier than Burt and often relies on his brother for reassurance. When treats are offered, Ernie will nudge Burt to fetch them and bring them back. If faced with something unfamiliar, Ernie will hug Burt tightly, seeking comfort and security.

The bond between Ernie and Burt is unbreakable. They dislike being separated, even for a short time while receiving care from their caregivers. When apart, they emit locator calls, communicating back and forth until they are reunited. This touching relationship underscores the deep connection and mutual reliance these twin brothers share, making their story one of the heartwarming highlights at Jungle Friends.