The Bird Spring Formation is a geologic formation in Nevada. It preserves fossils dating back to the Carboniferous and Permian periods. Earth sciences...

chaetetid from the Bird Spring Formation (Upper Carboniferous) of southern Nevada. Cross-section of a fossil chaetetid (Bird Spring Formation, Upper Carboniferous...

from Indiana Recrystallized bivalve shell with sparry calcite from Bird Spring Formation Replacement occurs when the shell, bone, or other tissue is replaced...

Heath Formation, Montana". Journal of Paleontology. 16 (3): 293–300. JSTOR 1298905. Dunn, David L. (1965). "Late Mississippian conodonts from the Bird Spring...

Pellets (a type of peloid) and a brachiopod shell visible in a limestone thin-section; Bird Spring Formation (Carboniferous) of southern Nevada....

sediment and sparry calcite cement in a recrystallized bivalve shell; Bird Spring Formation (Carboniferous) of southern Nevada, USA. Bioclasts in an Ordovician...

location for the base of a stage) for the Bashkirian is in the lower Bird Spring Formation at Arrow Canyon, Nevada. The Bashkirian contains six biozones based...

vary across bird families but variations within species are thought to be driven by environmental conditions. A unique system is the formation of trios where...

conodont Declinognathodus nodiliferus in the lower Bird Spring Formation, which overlies the Battleship Formation in Nevada. It is also slightly above the first...

snail. Fossils have been found in Artinskian era limestone from the Bird Spring Formation in the southern Arrow Canyon Range of the US State of Nevada. The...

are lithologically correlated with the Pennsylvanian to Permian Bird Spring Formation and Mississippian Monte Cristo Limestone. Wollastonite and phlogopite...

The Dove Spring Formation (formerly the Ricardo Formation) is a geologic formation in the western Mojave Desert of California. It preserves fossils dating...

from the Late Miocene of the Río Negro Formation, showcasing a trackway made by a mid-to-large sized terror bird with functionally didactyl footprints...

Pellets and a brachiopod shell visible in a limestone thin-section; Bird Spring Formation (Carboniferous) of southern Nevada....

flightless predatory birds in the family Phorusrhacidae or "terror birds" that lived during the Early Miocene (Deseadan) Fray Bentos Formation of Uruguay, Late...

Archaeocidaris plates and spines from the Bird Spring Formation (Carboniferous) exposed in Kyle Canyon, Spring Mountains, southern Nevada....

up fat stores for further travel. Geese, like other birds, fly in a V formation. This formation helps to conserve energy in flight, and aids in communication...

limestone and sandstone members of the Triassic Moenkopi Formation, and the Permian Bird Spring Formation which is predominantly limestone. West aspect of Edgar...

Ordovician Barstow Formation Neogene Battery Formation Bautista Formation Bedrock Spring Formation Neogene Bird Spring Formation Permian, Carboniferous...

Carboniferous Barrel Springs Formation Ordovician Bird Spring Formation Permian, Carboniferous Bird Spring Group/Indian Springs Formation Carboniferous Bonanza...

sparrow (Spizella passerina) is a species of New World sparrow, a passerine bird in the family Passerellidae. It is widespread, fairly tame, and common across...

comprise a formation of up to one million birds. Usually flocks break up when the number of individuals exceeds about half a million birds, due to excessive...

The Marcellus Formation or the Marcellus Shale is a Middle Devonian age unit of sedimentary rock found in eastern North America. Named for a distinctive...

Moa (order Dinornithiformes) are an extinct group of flightless birds formerly endemic to New Zealand. During the Late Pleistocene-Holocene, there were...

different from P. miocaenus or even from birds closer to Osteodontornis. Indeed, some of the older Bahía Inglesa Formation remains tentatively referred to Pelagornis...

take a look at several species while Super is the unfortunate target of bird activity. Ray Charles sings "Born to Lose". At the new Super Dave's Parade...

Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or...

Waikoropupū Springs and submarine springs offshore. In October 2023, the Wharepapa Arthur Marble Aquifer system and Te Waikoropupū Springs received protection...

Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With approximately 375 species and 113 genera, they occur...

synonymously with the vernacular term "bird" by these researchers. The earliest known avialans come from the Tiaojishan Formation of China, which has been dated...