A bark is a noise most commonly produced by dog

Dog

The domestic dog is a domesticated form of the gray wolf, a member of the Canidae family of the order Carnivora. The term is used for both feral and pet varieties. The dog may have been the first animal to be domesticated, and has been the most widely kept working, hunting, and companion animal in...

s and puppies

Puppy

A puppy is a juvenile dog. Some puppies may weigh , while larger ones can weigh up to . All healthy puppies grow quickly after birth. A puppy's coat color may change as the puppy grows older, as is commonly seen in breeds such as the Yorkshire Terrier...

. Other animals that make this noise include wolves and quolls. Woof is the most common representation in the English language

English language

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 for this sound (especially for large dogs). Other transliterations include the onomatopoeic ruff, arf, au au, yip (for small dogs), and bow-wow.
Although dogs are descended from the wolf

Gray Wolf

The gray wolf , also known as the wolf, is the largest extant wild member of the Canidae family...

, Canis lupus, their barking constitutes a significant difference from their parent species.