But the birds stayed on zoo grounds, and a team of at least 12 zoo workers armed with binoculars, nets, and crates has already recovered the three starlings, Dogan said.
"They are choosing to stay near the zoo and near the aviary because it seems that’s where they feel safe," she said.
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An endangered hooded vulture escaped from a Bay Area zoo in California on Tuesday. (Fox News)
The team has been working since Tuesday to entice the vulture with dead rats and the crows with mealworms to trap them and bring them back to safety, she said.
All the birds hatched in captivity, and it's not clear if they would know how to survive outside the zoo, Dogan said.
"These are all birds that were raised in human care, so they haven’t had to fend for themselves," she said.
None of these birds are birds of prey, and they are not a threat to other animals or people, Dogan said.