A tame, sports-playing wedge-tailed eagle has escaped its enclosure at a wildlife park in Western Australia, sparking concerns about its chances of survival in the wild.

A wildlife park volunteer says it is unlikely Onslow could catch his own live food. ( Supplied: Armadale Reptile and Wildlife Centre )

Onslow has spent the majority of its life in captivity at the Armadale Reptile and Wildlife Centre but managed to escape on June 10 while being tormented by wild birds.

"Onslow's enclosure is in the territory of the wild wedge-tailed eagle," volunteer Julie Chapman said.

"Unfortunately those eagles were harassing him and somehow the netting of his enclosure has become ripped and he's managed to escape and they've chased him away."

Ms Chapman said it was essential Onslow was found in the next couple of days, before he died from a lack of food and exposure to the elements.

"He has spent his whole life with humans and in captivity, so we're unsure how he's going to go out in the wild which is why we're very concerned about him," she said.

"He was rescued as a small fledgling and has an injury to his foot which means he can never be released."

The bird is cared for by the park's owner Klaas Gaikhorst who plays ball games with him.

"I wouldn't call it soccer, but he certainly likes playing ball with Klaas," Ms Chapman said.

She said the bird was at risk from other eagles, particularly during the current breeding season.

"He won't be scared off that easily, however wild birds would be probably pretty scared to have him in their territory," Ms Chapman said.

"He might be getting dive-bombed and scared off by other animals."

Onslow's diet of chickens, rabbits and rats will be much different outside of the enclosure.

"I don't think he'll be able to catch any live food," Ms Chapman said.

"Wedge-tailed eagles are scavengers so he could be looking for road kill, but we don't want him near the road, next to cars."

Ms Chapman said the bird should respond to its name and is friendly with humans.

"He won't be flying very high, he's not too scared of humans, so he'll probably be hanging around housing areas where the wild eagles wouldn't be hanging out," she said.

"If you talk to him and try and keep him entertained then he might hang around.

"We just ask that you don't approach him, because we don't want you to scare him away."

It is thought Onslow may be around the Kelmscott, Gosnells and Armadale area.