When you see characters composed of 鸟 niǎo, don’t think too much; they are just names of different birds or something related to a bird. Their pronunciations are the same as or similar to the pronunciations of the counterparts of 鸟, e.g. 武 wǔ + 鸟 ＝ 鹉 wǔ, 九 jiǔ + 鸟 ＝ 鸠 jiū.
