With a life expectancy of 30 years or more, southern ground hornbills are famously long-lived birds.
Like the sound of a booming bass, these ground hornbills are letting you know you are on their turf now.
"It's more like a territorial call. They'll do that to communicate to each other. That can be heard for like a couple of miles," said zoo keeper Susan Arbuthnot.
A sound that carries for miles in their native African habitat and a look like no other. These guys weigh up to 10 pounds, have feathers black as night, long eyelashes with a pop of red around their beak.
"The males have that red skin patch with a little bit of blue on the sides and the females actually have a larger violet patch under their chin," said Arbuthnot.
There are four groundbills at the Honolulu Zoo, but one that really sticks out is Abby. He is very energetic. That's because he was a movie star in his past life.
"Abby was actually in pictures and from our records, I think it says Paramount Pictures used to have him as animals they used in their productions," said Arbuthnot.
After his movie career ended in 1973, he landed at the Honolulu Zoo. Keepers believe it was during his movie days that he learned to interact with humans.
"He always wants to introduce you with some kind of food or treat just to get your attention," said Arbuthnot.
Ground hornbills are omnivores chowing down on everything from insects to fruits and even other birds. But sadly, keepers say the species is on the vulnerable list and are on its way to becoming critically endangered.
"That can be due to habitat destruction and people actually hunt them too," said Arbuthnot.
At the Honolulu Zoo, they're a sight to see on the ground and flying around.
The ground hornbill exhibit is part of a Mabula African hornbill conservation project. The Honolulu Zoo donates funds to help project organizers capture abandoned birds, nurse them back into health and release them back into the wild.