SAN FRANCISCO — San Francisco officials are considering removing the one remaining swan from a lake near the Palace of Fine Arts after the bird’s companion was killed over the weekend.

Rebecca Katz, director of San Francisco’s Animal Care and Control Department, told KTVU-TV on Monday she is worried the swan named Blanche could be attacked during the Thanksgiving holiday.

Katz said the department is working with the San Francisco Zoo to find a suitable spot there for the animal. Critics, however, say the move could prove too traumatic for Blanche and have called for a hearing.

Blanche’s companion was found dead Saturday morning. Its neck had been broken.

Authorities are offering a $500 reward for information that leads to the conviction of whoever was responsible for the animal’s death.