The image is a close-up of a black swallowtail caterpillar on a green plant stem. The caterpillar has a black and white striped pattern on its body, with orange and yellow stripes running horizontally across its body. Its head is slightly tilted downwards, and its antennae are visible. The plant stem is thin and green, and the background is blurred, making the caterpillar the focal point of the image.