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The marvelous spatuletail is a northern Peruvian hummingbird whose male has two tail feathers ending in spatules; the species was described in 1847.
The sword-billed hummingbird is the sole Ensifera species and the only bird whose bill exceeds its body, excluding tail, found along the Andes to Bolivia.
The wire-crested thorntail is Discosura popelairii, an Andean foothill hummingbird of Colombia, Ecuador, and Peru described in 1846.
The white-booted racket-tail is an Ocreatus hummingbird of Colombia, Ecuador, and Venezuela; males have white leg puffs and oval tail flags.
The red kangaroo is Australia's largest living marsupial, described by Desmarest in 1822 and widespread across the dry mainland interior.
The scissor-tailed hummingbird is an endangered Hylonympha endemic to Venezuela's Paria Peninsula, with only about 3,000 to 4,000 mature birds.
The horned sungem is the sole Heliactin hummingbird, native mainly to Brazil's Cerrado and named in 1820 for the male's horn-like head plumes.
The giant hummingbird is a large Andean Patagona hummingbird; a 2024 genomic study split the complex into northern and southern species.
Rivoli's hummingbird is a mountain-gem hummingbird from the southwestern United States to Nicaragua, split from the Talamanca hummingbird in 2017.
The velvet-purple coronet is a monotypic Boissonneaua hummingbird of the Choco Andes in Colombia and Ecuador, described by Bourcier in 1851.
The great sapphirewing is the only Pterophanes species and one of the largest hummingbirds, found in high Andes of Colombia, Ecuador, Peru, and Bolivia.
The black-tailed trainbearer is a Lesbia hummingbird of Colombia, Ecuador, and Peru, named for the male's long black tail at Andean elevations.
Gilbert's potoroo is a critically endangered Western Australian potoroid, described by Gould in 1841 and rediscovered in 1994.
The Brazilian ruby is a Heliodoxa hummingbird endemic to eastern and southeastern Brazil, first named Trochilus rubricauda by Boddaert in 1783.
The bearded mountaineer is a Peruvian endemic hummingbird and the only species in Oreonympha, described by John Gould in 1869 from Tinta, Peru.
The water opossum is the semiaquatic yapok, Chironectes minimus, described in 1780 and the most aquatic living marsupial from Mexico to Argentina.
The flame-throated sunangel is Heliangelus micraster, a small Ecuador and Peru hummingbird described by John Gould in 1872.
The Peruvian racket-tail is an Ocreatus hummingbird of eastern Ecuador and Peru, recognized by IOC and Clements as distinct from white-booted forms.
The feathertail glider is an eastern Australian acrobatid possum, described by Shaw in 1793 and often cited as the smallest gliding mammal.
The eastern grey kangaroo is a large macropod of eastern Australia, described by George Shaw in 1790 and often the country's most seen kangaroo.
The Blue-bearded helmetcrest is an Endangered Colombian hummingbird of the Sierra Nevada de Santa Marta, rediscovered in 2015 after decades unseen.
The pink-throated brilliant is a Heliodoxa hummingbird of Colombia, Ecuador, and Peru, recognized by its pinkish red throat patch and named by Gould in 1860.
The green-tailed trainbearer is a Lesbia hummingbird of the northern and central Andes, described by Lesson in 1832 and known for long green-tipped tails.
The purple-crowned fairy is a Heliothryx hummingbird from Mexico to northern Peru, notable for the male's violet crown and white underparts.
The empress brilliant is a Heliodoxa hummingbird of Colombia and Ecuador's Pacific-slope Choco forests, described by John Gould in 1856.
The hyacinth visorbearer is an Augastes hummingbird endemic to Brazil, notable as one of only two species in its genus with the hooded visorbearer.
The frilled coquette is Lophornis magnificus, a tiny hummingbird endemic to Brazil and described by Louis Pierre Vieillot in 1817.
The buff-tailed sicklebill is a Eutoxeres hermit of the lower Andes and west Amazonia, notable for its deeply curved bill and buff outer tail.
The western grey kangaroo is a large southern Australian macropod, formally described by Desmarest in 1817 from Kangaroo Island material.
The Virginia opossum (Didelphis virginiana) is the northernmost living marsupial, ranging from Costa Rica into Canada and named by Kerr in 1792.
