A lynar
The lynar was a harmless bat-like creature native to Celtris III. They typically lived in caves.
In 2369, Captain Jean-Luc Picard, Doctor Beverly Crusher, and Lieutenant Worf encountered a small flock of lynars on Celtris III. According to Picard, they were, "harmless" and common to Celtris III. (TNG: "Chain Of Command, Part I")
According to the script, the pronunciation for lynar was "LIE-nar".