Kløer

Kløer is a term of Scandinavian origin, most commonly referring to the sharp, curved appendages found at the end of the digits of many animals, particularly vertebrates. These structures are primarily composed of keratin, the same protein that makes up human fingernails and hair. Kløer serve a variety of crucial functions depending on the species.

In many mammals, such as cats and dogs, kløer are used for traction while running, climbing, and for defense. Predators often use their kløer to capture and hold prey. Birds possess kløer, also known as talons, which are highly adapted for grasping branches, catching food, or for defense. Reptiles, including lizards and turtles, also have kløer that aid in locomotion, digging, and sometimes in defense. Even some amphibians and fish have rudimentary claw-like structures.

The morphology and sharpness of kløer can vary significantly. For example, the retractable kløer of felines are adapted for maintaining sharpness for hunting, while the non-retractable kløer of canids are more suited for digging and endurance. The wear and tear on kløer are often naturally managed through use, though in domesticated animals, regular trimming may be necessary to prevent overgrowth and associated health problems. In some contexts, the word "kløer" can also be used metaphorically to describe a forceful or grasping hold.