Hen commonly refers to a female animal: a female chicken, other gallinaceous bird, any type of bird in general, or a lobster. It is also a slang term for a woman.
Hens make the signature chicken 'clucking' sound you're probably familiar with. As far as the hen's looks, it often has a reddish piece sticking up on the top of its head that looks like a comb, and its body is short and round. Hens' bodies are covered in feathers, and they have wings that mainly stay tucked alongside their bodies.
Crows live in large, close-knit families, and, like social mammals, they not only hunt and forage together but also defend territories and care for the young together. Most species, however, do not nest in colonies. Each mating pair has its own nest of sticks and twigs, usually high up in a tree. There are laid five or six greenish-to-olive eggs, with darker speckles. Young crows may spend up to six years with their parents before breeding on their own. As winter approaches, northern crows gather into large night-roosting groups. These flocks can include tens of thousands of birds and occasionally hundreds of thousands.