Translation

bikūnya means "Vicuña" in English.
It's a katakanization, a loan-word.

bikūnya is normally written with katakana, as ビクーニャ.
bikūnya written with hiragana is びくーにゃ.
bikūnya does not have kanji.
Romaji bi kuu nya
Katakanaニャ
Hiraganaにゃ

Orthography Notes

Further Reading

Wikipedia: ビクーニャ (Vicuna)