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List Of Struthioniformes By Population
This is a list of Struthioniformes species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology. This list is not comprehensive, as not all extant Struthioniformes have been enumerated. Species by global population See also *Lists of birds by population *Lists of organisms by population References {{Birds by population Biology-related lists, Birds Lists of birds by population, Struthioniformes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthioniformes
Struthioniformes is an order of birds with only a single extant family, Struthionidae, containing the ostriches. Several other extinct families are known, spanning across the Northern Hemisphere, from the Early Eocene to the early Pliocene, including a variety of flightless forms like the Paleotididae, Geranoididae, Eogruidae and Ergilornithidae, the latter two thought to be closely related to Struthionidae. Evolutionary history According to Mayr and Zelenkov (2021), all Struthioniformes are united by the following characters: "a very long and narrow tarsometatarsus with short trochleae for the second and fourth toes, a tubercle next to the pons supratendineus on the distal end of the tibiotarsus, as well as a shortening of all non-ungual phalanges of the fourth toe except for the proximal one" All known members of the group are thought to have been flightless. Struthioniformes were widely distributed in the Northern Hemisphere during the Eocene, including Paleotididae from Eur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Spotted Kiwi
The great spotted kiwi, great grey kiwiDavies, S. J. J. F. (2003) or roroa (''Apteryx haastii'') is a species of kiwi endemic to the South Island of New Zealand. The great spotted kiwi, as a member of the ratites, is flightless. It is the largest of the kiwi. The rugged topography and harsh climate of the high altitude alpine part of its habitat render it inhospitable to a number of introduced mammalian predators, which include dogs, ferrets, cats, and stoats. Because of this, populations of this species have been less seriously affected by the predations of these invasive species compared to other kiwi. Nonetheless, there has been a 43% decline in population in the past 45 years, due to these predators and habitat destruction. This has led it to be classified as vulnerable. There are less than 16,000 great spotted kiwis in total, almost all in the more mountainous parts of northwest Nelson, the northwest coast, and the Southern Alps. A minority live on island reserves. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lists Of Organisms By Population
This is a collection of lists of organisms by their population. While most of the numbers are estimates, they have been made by the experts in their fields. Species population is a science falling under the purview of population ecology and biogeography. Individuals are counted by census, as carried out for the piping plover; using the transect method, as done for the mountain plover; and beginning in 2012 by satellite, with the emperor penguin being first subject counted in this manner. Number of species More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described. According to another study, the number of described species has been estimated at 1,899,587. 2000–2009 saw approximately 17,000 species described per year. The total ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lists Of Birds By Population
This is a list of bird species by global population, divided by bird classification. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology. Contributing organizations include the IUCN, BirdLife International, and Partners in Flight. The average global population of all mature birds is estimated to be somewhat less than 90 billion (actually, somewhere between 40 and 130 billion; this too is a rough estimate). The total population including younglings is somewhat higher during the breeding season of each species. This list is incomplete, because experts have not estimated all bird numbers. For example, the spectacled flowerpecker was only discovered in 2010, and did not receive its scientific name (''Dicaeum dayakorum'') until 2019,Saucier, Jacob R.; Milensky, Christopher M.; Caraballo-Ortiz, Marcos A.; Ragai, Roslina; Dahlan, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Island Brown Kiwi
The North Island brown kiwi (''Apteryx mantelli''; ''Apteryx australis'' or ''Apteryx bulleri'' as before 2000, still used in some sources) is a species of kiwi that is widespread in the northern two-thirds of the North Island of New Zealand and, with about 35,000 remaining,BirdLife International (2008) it is the most common kiwi. It holds the world record for laying the largest eggs relative to its body size. Genetics The genome of ''Apteryx mantelli'' was sequenced in 2015. Taxonomy Until 2000, the brown kiwi (then ''Apteryx australis'') was thought to include the rowi and the tokoeka, in addition to the North Island brown kiwi. However using genetic codes from each of the above it was determined that the tokoeka was a separate species, it took the ''Apteryx australis'' name, leaving the brown kiwi with its current ''Apteryx mantelli'' name. Soon after, in 1998, more genetic tests were done with the rowi and it was determined that it (the rowi) was a separate species (''Apte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokoeka
The southern brown kiwi, tokoeka, or common kiwiDavies, S. J. J. F. (2003) (''Apteryx australis'') is a species of kiwi from South Island, New Zealand. Until 2000 it was considered conspecific with the North Island brown kiwi, and still is by some authorities. Taxonomy ''Apteryx australis'' is based on Greek and Latin. ''Apteryx'' means "''A-''" without "''pterux''" wings, and "''australis''" from "''auster''" the south wind, and "''-alis''" relating to. The southern brown kiwi belongs to the kiwi family and it is a ratite, and a member of the order Apterygiformes. Like all ratites, its sternum has no keel, it is flightless, and it has a distinctive palate. The holotype specimen of ''Apteryx australis'' ShawNat. Miscell., 24,1813, pl1057 is held in the collections of National Museums Liverpool at World Museum, with accession number NML-VZ D180. The specimen was collected by Captain Barclay at Dusky Sound, South Island, New Zealand and came to the Liverpool national collection ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Brown Kiwi
The southern brown kiwi, tokoeka, or common kiwiDavies, S. J. J. F. (2003) (''Apteryx australis'') is a species of kiwi from South Island, New Zealand. Until 2000 it was considered conspecific with the North Island brown kiwi, and still is by some authorities. Taxonomy ''Apteryx australis'' is based on Greek and Latin. ''Apteryx'' means "''A-''" without "''pterux''" wings, and "''australis''" from "''auster''" the south wind, and "''-alis''" relating to. The southern brown kiwi belongs to the kiwi family and it is a ratite, and a member of the order Apterygiformes. Like all ratites, its sternum has no keel, it is flightless, and it has a distinctive palate. The holotype specimen of ''Apteryx australis'' ShawNat. Miscell., 24,1813, pl1057 is held in the collections of National Museums Liverpool at World Museum, with accession number NML-VZ D180. The specimen was collected by Captain Barclay at Dusky Sound, South Island, New Zealand and came to the Liverpool national collectio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Least Concern
A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. They do not qualify as threatened, near threatened, or (before 2001) conservation dependent. Species cannot be assigned the "Least Concern" category unless they have had their population status evaluated. That is, adequate information is needed to make a direct, or indirect, assessment of its risk of extinction based on its distribution or population status. Evaluation Since 2001 the category has had the abbreviation "LC", following the IUCN 2001 Categories & Criteria (version 3.1). Before 2001 "least concern" was a subcategory of the "Lower Risk" category and assigned the code "LR/lc" or lc. Around 20% of least concern taxa (3261 of 15636) in the IUCN database still use the code "LR/lc", which indicates they have not been re-evaluate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Cassowary
The southern cassowary (''Casuarius casuarius''), also known as double-wattled cassowary, Australian cassowary or two-wattled cassowary, is a large flightless black bird. It is one of the three living species of cassowary, alongside the dwarf cassowary and the northern cassowary. It is a ratite and therefore related to the emu, ostriches, rheas and kiwis. Taxonomy Presently, most authorities consider the southern cassowary monotypic, but several subspecies have been described. It has proven very difficult to confirm the validity of these due to individual variations, age-related variations, the relatively few available specimens (and the bright skin of the head and neck – the basis upon which several subspecies have been described – fades in specimens), and that locals are known to have traded live cassowaries for hundreds, if not thousands of years, some of which are likely to have escaped/been deliberately introduced to regions away from their origin. Cassowaries are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
