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The brown pelican (Pelecanus occidentalis) is a bird of the pelican family, Pelecanidae, one of three species found in the Americas and one of two that...

Thuja occidentalis, also known as northern white-cedar, eastern white-cedar, or arborvitae, is an evergreen coniferous tree, in the cypress family Cupressaceae...

Platanus occidentalis, also known as American sycamore, American planetree, western plane, occidental plane, buttonwood, and water beech, is a species...

1864, Marsh renamed his giant North American pterosaur Pterodactylus occidentalis, meaning "Western wing finger," in his 1872 description of the new specimen...

In medieval historiography, West Francia (Medieval Latin: Francia occidentalis) or the Kingdom of the West Franks (Latin: regnum Francorum occidentalium)...

The spotted owl (Strix occidentalis) is a species of true owl. It is a resident species of old-growth forests in western North America, where it nests...

The northwestern wolf (Canis lupus occidentalis), also known as the Mackenzie Valley wolf, Alaskan timber wolf, or Canadian timber wolf, is a subspecies...

The western grebe (Aechmophorus occidentalis) is a species in the grebe family of water birds. Folk names include "dabchick", "swan grebe" and "swan-necked...

Kumbadjena occidentalis is a species of velvet worm in the family Peripatopsidae described by Joseph James Fletcher in 1895. This species has 15 pairs...

(Talpa occidentalis) is a species of mammal in the family Talpidae. It is found in Spain and Portugal. Cassola, F. (2016). "Talpa occidentalis". IUCN...

The western gull (Larus occidentalis) is a large white-headed gull that lives on the west coast of North America and the Pacific Ocean. The western gull...

Ceiba caribaea (DC.) A.Chev. Ceiba guineensis (Schumach.) A.Chev. Ceiba occidentalis (Spreng.) Burkill Ceiba thonningii A.Chev. Eriodendron caribaeum (DC...

vertebrae and a phalanx. In 1856 Leidy named the type species Thespesius occidentalis for these three bones. The generic name is derived from Greek θεσπεσιος...

Juniperus occidentalis, known as the western juniper, is a shrub or tree native to the Western United States, growing in mountains at altitudes of 800–3...

time, the western round-eared bat had a trinomen of Tonatia silvicola occidentalis. In 2011, it was recognized as a full species. In the same publication...

Senna occidentalis, commonly known as coffee senna, styptic weed, or septicweed, is a species of flowering plant in the family Fabaceae and is native to...

mucronatus Caro & E.A.Sánchez Cynodon nitidus Caro & E.A.Sánchez Cynodon occidentalis Willd. ex Steud. nom. inval. Cynodon pascuus Nees Cynodon pedicellatus...

Cephalanthus occidentalis is a species of flowering plant in the family Rubiaceae that is native to eastern and southern North America. Common names include...

The western fence lizard (Sceloporus occidentalis) is a common lizard of Arizona, New Mexico, California, Idaho, Nevada, Oregon, Utah, Washington, Northern...

The northern spotted owl (Strix occidentalis caurina) is one of three spotted owl subspecies. A western North American bird in the family Strigidae, genus...