Doggtyred
En-Route
The ultralight pilot in question was fined for violating a State wildlife protection statute, not a FAR. The fact that an aircraft was involved is incidental. He would have accrued the same fine if he used a ladder to get close to the nest.
And he was fined for "disturbing wildlife". The law itself does not spell out specific distances or altitudes to maintain from the nests in question. This is a judgment call by the officer that will play out in court, not a clear cut violation of a specific rule. This very well isn't over if the pilot chooses to fight it.