The Welsh Terrier is a small, sturdy dog known for its dense, wiry coat that is predominantly black and tan. Originally bred for hunting foxes and badgers in Wales, it is energetic and intelligent, making it both a skilled hunter and a lively companion. This breed is distinguished by its friendly and outgoing nature, as well as its remarkable adaptability to various living environments.

The Welsh Terrier is a domesticated dog breed that originated in Wales, United Kingdom. It was developed in the 18th century for hunting purposes, particularly for hunting foxes and badgers.

As a domesticated breed, Welsh Terriers are not found in the wild and thus do not have a natural habitat. They thrive in environments provided by human companionship, such as homes and gardens. Being an adaptable breed, they can live in both urban and rural settings, provided they receive sufficient exercise and mental stimulation.

Welsh Terriers do not occupy a specific ecological niche as wild animals do. Their 'niche' is as companion animals and working dogs in human society. Historically, they were used for hunting and pest control due to their keen senses and tenacity.