The bird specimen bottle had been sealed for nearly 60 years, collecting dust in a storage area at the Milwaukee Public Museum.
In December 1979, Greg Septon, then 27 years old and a taxidermist for the organization, grew curious about its contents.
He held up the jar of murky alcohol and looked for clues. His heart jumped: A notched beak was pressed up against the glass.
A licensed falconer and raptor bander, Septon immediately knew the jar held falcon chicks. Once opened, the container produced three young peregrine falcons.
A tag inside the bottle revealed the birds' origin.