Results of a necropsy on the animal revealed that the bird, a Mute Swan so-named for its less vocal nature, died of a dislocated neck, according to an animal control statement released Friday.
Animal Care and Control Dr. Bing Dilts said in the statement that the death of the swan was "most likely the result of human interaction" rather than an animal attack or vehicular interaction.
Anyone with information related to the bird's demise is urged to call Animal Care and Control at (415) 554-9400.
Information leading to the arrest and conviction of those responsible for the swan's death will earn the informant a reward, according to Animal Care and Control. Those wishing to contribute to the reward fund can learn more by calling (415) 554-9413.