蝥

Its parts

• 敄 wù to put forth effort = 矛 + 攵 sound
• 虫 chóng lower form of animal life, including… meaning

Other characters with 敄 as their sound:

鍪 móu婺 wù鹜 wù楘 mù骛 wù瞀 mào

Dictionaries file it under 虫.