Clucking mothers is a term used to describe HENS, which are female chickens. HENS are known for their clucking sound, which is why they are referred to as clucking mothers. The term is also used to refer to the motherly nature of HENS, as they are often seen taking care of their chicks. The term can also be used to refer to the protective nature of HENS, as they will often protect their chicks from predators. The term clucking mothers is derived from the four-letter word 'HENS'.