a black and white continuous line drawing of a hippopotamus's head, with its eyes, nose, and mouth clearly visible.

black white continuous line drawing hippopotamuss head its eyes nose mouth clearly visible illustration hippopotamus sketch animal safari outline zoo graphic hippo africa art wild design wildlife doodle cute cartoon silhouette nature symbol giraffe isolated funny elephant jungle african set icon hand element happy contour monkey lion abstract mammal style rhinoceros print background sign fauna character rhino zebra