The owl who manages the museum in Animal Crossing is Blathers. He is a great horned owl and one of the series' most recognizable recurring characters.
Blathers oversees the museum's collections, which can include fish, insects, fossils, sea creatures, and artwork, depending on the game. In New Horizons, the museum begins as a tent before becoming a full building as the player's island develops. Players expand its exhibits by donating discoveries rather than selling them.
A common mix-up is confusing Blathers with his younger sister, Celeste. Celeste is also an owl, but she studies astronomy and appears to discuss stars, constellations, and meteor showers. Brewster, meanwhile, runs The Roost café, while Tom Nook handles the island's business and housing operations.
Blathers' enthusiastic but squeamish reactions to donated bugs are a long-running character trait. His role combines the practical function of cataloguing the player's finds with the museum's broader educational purpose.