Panda
The giant panda's daily utility to human civilisation approaches zero in practical terms. These creatures cannot be domesticated, ridden, milked, or employed in any conventional labour. Their contribution consists entirely of existing photogenically and thereby generating tourism revenue and conservation awareness. A panda spends approximately 14 hours daily eating bamboo to extract sufficient nutrients from a food source its digestive system was never designed to process. The remaining hours involve sleeping, defecating up to 40 times per day, and occasionally falling over in ways that humans find inexplicably delightful. No task of meaningful productivity has ever been completed by a panda.