Staff at Singapore's Jurong Bird Park refer to him simply as the "bird whisperer," Agence France Presse reports.
Deaf since childhood, Razali Bin Mohamad Habidin has developed a closer bond with the creatures under his care than any other keeper at the park.
Razali, who lost his hearing as a baby, started working at the park over two decades ago, rising to the position of deputy head avian keeper.
He communicates with the birds through grunts, gestures and body languages, and told AFP that he recognizes the birds by their "behaviors and personalities."
"All of them are my friends," he added, communicating through a mix of gestures and Malay.
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