The fear of a swan being your brother/sister.
A root of Kyknophobia, which is a root of aerozoophobia, which is a root of zoophobia.
Hey, why is Jim so scared of Swan?"
Ah, he's got Kyknofratremphobhia (He thinks the swan wants to be his brother.)" /
Jim: "STAY AWAY FROM ME! WE'RE NOT FAMILY!
Swan: -_- just wanted a cookie ._.
Note: Not Kyknofratremphobia if only scared of swan.