榕樹[gajumaru] Chinese banyan (Ficus microcarpa or Ficus retusa)

金糸雀[kinshijaku] canary (esp. the island canary, Serinus canaria)
燕雀[enjaku] small birds
黄雀[koujaku] tree sparrow (Passer montanus)
欣喜雀躍[kinkijakuyaku] jump up for joy
孔雀[kujaku] peafowl (inc. the male peacock, female peahen, and young peachick)

孔雀石[kujakuseki] malachite
孔雀妙王[kujakumyouou] Mayuri Vidya-raja
四十雀[shijuukara] great tit (Parus major)
雀の涙[suzumenonamida] drop in the bucket