Blathers the owl is in charge of the Museum on Main Street. He assesses unidentified fossils, and accepts donations for the museum. He doesn't much care for bugs, as evidenced by his distress when you donate a bug to him. As he is an owl, he sleeps through the day and is only awake at night. However, the Museum is always open, and you can talk to him even if he's asleep.
Unlike other games in the series, Blathers no longer gives the player direct information on the species they donate. Instead, detailed plaques of information can be found in the exhibit areas.