HONOLULU -- Restaurant goers at Roy's Restaurant in Koolina said they get to witness an animal turning the term "bird brain" on its head.

They said they call him Hank. The Aku'u -- or black crowned night heron -- has developed some expert fishing skills to grab fish from the Koi Pond.

They said Hank finds a piece of bread, which is not part of a Heron's diet, and uses the bread to attract fish and when the fish come to eat the bread, he catches them.

"First thing I thought was this is one smart birdie," said Carroll Cox, who recorded the bird fishing. "The wind would blow the bread away, he'd grab it and put it back or the fish would come a big fish, he'd grab it and then remove it till the big fish leaves place it back. Or the wind would blow; he'd submerge it -- so there's some thinking going on," said Cox.

Cox said he believes the bird learned the behavior by watching and learning from his environment.

"He watched the birds, people come and feed fish and think he just acclimated 'I can manipulate this as well,'" said Cox.