In a heartwarming video, a 67-year-old actor from Cyprus became determined to use his CPR expertise to save a tiny, helpless sparrow.

The avian creature was found unconsciousness following an "unfortunate pool mishap".

In the background of the video, you can hear a chorus of teasing and snickering, with voices urging him to dispose of the seemingly lifeless bird-but Costakis Constantinou remained undeterred.

"Nobody thought this was possible or even worth trying, however, he stayed focus and patiently continued," his son Rolandos told WS.

With unwavering determination, he persistently, applied his life-saving skills until, against all odds, the sparrow gradually regained consciousness, fluttering back to life.

"I can say with confidence that he was very, very happy, relieved, and satisfied when the little sparrow open its eyes and flied away."

When Rolandos rewatched the video again (see below), he got emotional and telephoned his dad to tell him how proud he was.

"In the past he saved two people from heart attack by applying CPR. For some reason my father is at the right place the right time."

"I wanted to surprise him by sending over his video," said Rolandos in an email. "I'm so proud of him."

Watch the moment his patience was rewarded…

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