Officials are searching for a vulture that flew away from the National Aviary in Pittsburgh during an open-air show.

The Pittsburgh Tribune-Review reports the vulture flew into a wooded area and was spotted in a tree near the Community College of Allegheny County, but it was still on the loose Thursday night.

A team from the aviary spent several hours tracking the vulture and was expected to camp out overnight with the critically endangered bird. Aviary spokeswoman Robin Weber says the bird will stay in place at night because it can't see in the dark.

Team members tried to bait the bird with food but it had just eaten before flying away. Weber says it could be Friday morning until the bird is brought back to the aviary.

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