A Thestral is a breed of winged horses with a skeletal body, face with reptilian features, and wide, leathery wings that resemble a bat's. They are very rare, and are considered dangerous by the Ministry of Magic.
A dog collar is a piece of material put around the neck of a dog. A collar may be used for control, identification, fashion, or other purposes. Identification tags and medical information are often placed on dog collars. Collars are also useful for controlling a dog manually, as they provide a handle for grabbing.
Choke collars are also a type of training collars. They are made of different materials with high resistance such as metal or various composites. This type of collar is suitable for obedience training as it tightens around the neck of the dog if it goes further than the owner allows it to.