With their distinctive black-and-white stripes, zebras are among the most recognisable mammals. They have been associated with beauty and grace, with naturalist Thomas Pennant describing them in 1781 as "the most elegant of quadrupeds". Zebras have been popular in photography, with some wildlife photographers describing them as the most photogenic animal. Zebras have become staples in children's stories and wildlife-themed art, such as depictions of Noah's Ark. They are known for being among the last animals to be featured in the dictionary and in children's alphabet books where they are often used to represent the letter 'Z'. Zebra stripes are also popularly used for body paintings, dress, furniture and architecture.