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Felted
A felted material is a hairy or filamentous (hairy-like) fibre that is densely packed or tangled, forming felt or felt-like structures. Anatomy and zoology The dermis is described in Gray's Anatomy as "felted connective tissue, with a varying amount of elastic fibers and numerous blood vessels, lymphatics, and nerves." When describing the external coat of an artery (the ''tunica adventitia''), Gray said that it "...consists mainly of fine and closely felted bundles of white connective tissue..." In such classes of connective tissue the felted structure helps with resistance to tearing by distributing localised stresses, and it imparts shock absorption and elasticity in two or three dimensions at once regardless of the shape of the tissue. In other words, certain types of felting can yield controllable isotropy or anisotropy in the behaviour of a structure. Mammals Although truly felted hair on healthy mammals is unusual, many animals, especially in seasonally cold or wet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Felt
Felt is a textile material that is produced by matting, condensing and pressing fibers together. Felt can be made of natural fibers such as wool or animal fur, or from synthetic fibers such as petroleum-based acrylic or acrylonitrile or wood pulp–based rayon. Blended fibers are also common. Natural fibre felt has special properties that allow it to be used for a wide variety of purposes. "It is fire-retardant and self-extinguishing; it dampens vibration and absorbs sound; and it can hold large amounts of fluid without feeling wet..." History Felt from wool is one of the oldest known textiles. Many cultures have legends as to the origins of felt making. Sumerian legend claims that the secret of feltmaking was discovered by Urnamman of Lagash. The story of Saint Clement and Saint Christopher relates that the men packed their sandals with wool to prevent blisters while fleeing from persecution. At the end of their journey, the movement and sweat had turned the wool int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisticola
__NOTOC__ Cisticolas (pronounced ''sis-TIC-olas'') are a genus of very small insectivorous birds formerly classified in the Old World warbler family Sylviidae, but now usually considered to be in the separate family Cisticolidae, along with other southern warbler genera. They are believed to be quite closely related to the swallows and martins, the bulbuls and the white-eyes. The genus contains about 50 species, of which only two are not found in Africa: one in Madagascar and the other from Asia to Australasia. They are also sometimes called fantail-warblers due to their habit of conspicuously flicking their tails, or tailor-birds because of their nests. The genus was erected by the German naturalist Johann Jakob Kaup in 1829. The name ''Cisticola'' is from Ancient Greek ''kisthos'', " rock-rose", and Latin ''colere'', "to dwell". Range and habitat Cisticolas are widespread through the Old World's tropical and sub-tropical regions. Africa, which is home to almost all species, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnoid (botany)
Arachnoid as a descriptive term in botany, refers to organs such as leaves or stems that have an external appearance similar to cobwebs from being covered with fine white hairs, usually tangled. Such material is one common cause of plants having a grey or white appearance.Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Derivation and Accent; Published by Gerald Duckworth & Co. London, 4th ed 1928 The usages of various authors in distinguishing between "arachnoid" and a few other terms referring to hairiness, such as floccose, pubescent, tomentum, cottony, or villous, tend to be arbitrary, but as a rule the term is best reserved for hairiness lighter than a felted layer, and inclined to rub off or to be easily damaged in other ways. The arachnoid appearance is common on the leaves and stems of various sclerophyllous members of the Asteraceae, such as some thistles. Nonetheless, "cobwebbiness" is a subjective impression, and in the likes of ''Hayworthia arachnoi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carder Bee - Felted Nesting Materia IMG 0273s
Carder may refer to: * Carder (name), a surname * A practitioner of carding, a method of preparing wool for use as a textile * A practitioner of carding, in the context of credit card fraud Credit card fraud is an inclusive term for fraud committed using a payment card, such as a credit card or debit card. The purpose may be to obtain goods or services or to make payment to another account, which is controlled by a criminal. The ... See also * Carding (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lanolin
Lanolin (from Latin 'wool', and 'oil'), also called wool yolk, wool wax, or wool grease, is a wax secreted by the sebaceous glands of wool-bearing animals. Lanolin used by humans comes from domestic sheep breeds that are raised specifically for their wool. Historically, many pharmacopoeias have referred to lanolin as wool fat ('' adeps lanae''); however, as lanolin lacks glycerides (glycerol esters), it is not a true fat. Lanolin primarily consists of sterol esters instead. Lanolin's waterproofing property aids sheep in shedding water from their coats. Certain breeds of sheep produce large amounts of lanolin. Lanolin's role in nature is to protect wool and skin from climate and the environment; it also plays a role in skin ( integumental) hygiene. Lanolin and its derivatives are used in the protection, treatment, and beautification of human skin. Composition A typical high-purity grade of lanolin is composed predominantly of long chain waxy esters (approximately 97% by weight) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icerya Purchasi 1
''Icerya'' is a genus of scale insects in the family Monophlebidae. It is named after physician-naturalist Dr. Edmond Icery of British Mauritius. Hermaphroditism Hermaphroditism is extremely rare in the insect world despite the comparatively common nature of this condition in the crustaceans. Several species of ''Icerya'', including the pestiferous cottony-cushion scale, ''I. purchasi'', are known to be hermaphrodites that reproduce by self-fertilising. Occasionally males are produced from unfertilised eggs, but generally individuals are monoecious with a female-like nature but possessing an ovotestis (a part-testis, part-ovary organ) and sperm is transmitted ovarially from the female to her young. This hermaphroditic sexual self-sufficiency, where a single individual can populate new territory, has contributed to the invasive spread of the cottony-cushion scale insect away from its native Australia.The Insects An outline of Entomology, Gullan & Cranston, Wiley-Blackwell 2001 L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Eider
The common eider (pronounced ) (''Somateria mollissima''), also called St. Cuthbert's duck or Cuddy's duck, is a large ( in body length) sea-duck that is distributed over the northern coasts of Europe, North America and eastern Siberia. It breeds in Arctic and some northern temperate regions, but winters somewhat farther south in temperate zones, when it can form large flocks on coastal waters. It can fly at speeds up to . The eider's nest is built close to the sea and is lined with eiderdown, plucked from the female's breast. This soft and warm lining has long been harvested for filling pillows and quilts, but in more recent years has been largely replaced by down from domestic farm-geese and synthetic alternatives. Although eiderdown pillows or quilts are now a rarity, eiderdown harvesting continues and is sustainable, as it can be done after the ducklings leave the nest with no harm to the birds. Taxonomy The common eider was formally named by the Swedish naturalist Carl L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prinia
Prinia is a genus of small insectivorous birds belonging to the passerine bird family Cisticolidae. They were at one time classed in the Old World warbler family, Sylviidae. The prinias are sometimes referred to as wren-warblers. They are a little-known group of the tropical and subtropical Old World, the roughly thirty species being divided fairly equally between Africa and Asia. These are birds mainly of open habitats such as long grass or scrub, in which they are not easily seen. They are mainly resident, migration being limited to local cold weather movements. Non-breeding birds may form small flocks. Prinias have short wings but long tapering tails. They are fairly drab birds, brown or grey above (sometimes with dark streaks) and whitish below. Some species have different breeding and non-breeding plumages. The bill is a typical insectivore's, thin and slightly curved. Taxonomy The genus was erected by the American naturalist Thomas Horsfield in 1821. The type species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hummingbird
Hummingbirds are birds native to the Americas and comprise the Family (biology), biological family Trochilidae. With about 361 species and 113 genus, genera, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are found in the tropics around the equator. They are small birds, with most species measuring in length. The smallest extant taxon, extant hummingbird species is the bee hummingbird, which weighs less than . The largest hummingbird species is the giant hummingbird, weighing . They are specialized for feeding on flower nectar, but all species also consume flying insects or spiders. Hummingbirds split from their Sister taxon, sister group, the Swift (bird), swifts and treeswifts, around 42 million years ago. The common ancestor of extant hummingbirds is estimated to have lived 22 million years ago in South America. They are known as hummingbirds because of the humming sound created by their beating Bird's wing, wings, which flap at high freq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carduelis
The genus ''Carduelis'' is a group of birds in the finch family Fringillidae. The genus ''Carduelis'' was introduced by the French zoologist Mathurin Jacques Brisson in 1760 by tautonomy based on Carl Linnaeus's specific epithet for the European goldfinch ''Fringilla carduelis''. The name ''carduelis'' is the Latin word for the European goldfinch. Many bird species were at one time assigned to the genus, but it became clear from phylogenetic studies of mitochondrial and nuclear DNA sequences that the genus was polyphyletic. The polyphyletic nature of the genus was confirmed by Dario Zuccon and coworkers in a comprehensive study of the finch family published in 2012. The authors suggested splitting the genus into several monophyletic clades, a proposal that was accepted by the International Ornithologists' Union. The siskins and goldfinches from the Americas formed a distinct clade and were moved to the resurrected genus '' Spinus'', the greenfinches were moved to the genus ''Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Rennie (naturalist)
James Rennie (26 February 1787, Sorn – 1867, Adelaide) was a Scottish naturalist. Life In 1815 he graduated M.A. from Glasgow University where he had previously studied natural sciences, and took holy orders. In 1821 he moved to London. From 1830 to 1834 he was professor of natural history and zoology at King's College. From then on he made his living as a natural history author. Rennie emigrated to Australia, 1840, where he ran the College High School in Elizabeth Street, Sydney, with an emphasis on the arts and natural history. Works Rennie wrote, among many other books, ''The Natural History of Insects'' published by John Murray (1829) and co-authored with John Obadiah Westwood; ''Insect Architecture'' (1830), a popular work originally in the Library of Entertaining Knowledge but reissued in 1857 by John Murray; and ''Alphabet of Botany For Use of Beginners'' (1834). Among the books that Rennie edited was Gilbert White Gilbert White FRS (18 July 1720 – 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ploceidae
Ploceidae is a family of small passerine birds, many of which are called weavers, weaverbirds, weaver finches and bishops. These names come from the nests of intricately woven vegetation created by birds in this family. In most recent classifications, Ploceidae is a clade, which excludes some birds that have historically been placed in the family, such as some of the sparrows, but which includes the monotypic subfamily Amblyospizinae. The family is believed to have originated in the mid-Miocene. All birds of the Ploceidae are native to the Old World, most in Africa south of the Sahara, though a few live in tropical areas of Asia. A few species have been introduced outside their native range. Taxonomy and systematics The family Ploceidae was introduced (as Ploceïdes) by the Swedish zoologist Carl Jakob Sundevall in 1836. Phylogenetic studies have shown that the family is sister to a clade containing the families Viduidae and Estrildidae Their common ancestor lived in the middl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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