A diverse group of warm-blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked jaws, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton, and including all animals commonly known as birds. This category also references various breeds of horses and other farm animals, signifying the distinct genetic lineages and particular traits that have been selectively bred over generations. Farm animals include livestock and other creatures that are raised in an agricultural setting for commodities such as meat, eggs, milk, fur, and wool. Animals, the most inclusive term, comprise all forms of life in the animal kingdom, from birds and horses to insects and sea creatures.