Two incidents have shattered the lagoon's tranquility within the past year. Last month someone broke the neck of one bird. Earlier this year, another swan was stolen from the lagoon.
The last remaining swan has been temporarily relocated for her safety. She will be returned to the lagoon next month, along with a new companion.
Alioto-Pier's resolution calls on city officials to develop a plan to ensure the long-term safety of the swans.