A monograph of the Trochilidae, or family of humming-birds, London, Printed by Taylor and Francis, 1861 i.e. 1849-1861, hummingbirds, Campylopterus ensipennis, White-tailed Sabrewing, A pair of vibrant hummingbirds, showcasing their iridescent green feathers, are depicted hovering gracefully near a cluster of yellow blossoms. Their elongated bodies and delicate wings highlight the intricate details of their anatomy as they seek nectar. The backdrop features lush foliage, enhancing the lively atmosphere, while the delicate petals of the flowers provide a striking contrast to the birds' shimmering plumage. Below the scene, the scientific name 'Campylopterus ensipennis' is elegantly inscribed, indicating the species of these captivating birds.