"At the farm there are neither fish nor birds."
Translation:Op de boerderij zijn noch vissen noch vogels.
No, it's possible to include it but not necessary. Because "Op de boerderij" was moved to the beginning of the sentence, it fulfills the same function as "er" would.
Note that if you would include "er", it would come after the verb: "Op de boerderij zijn er noch vissen, noch vogels."