Pterylae
Webd) Pterylae contradict an initially thermoregulatory role. e) Feathers are fundamentally designed to be aerodynamic structures. The first of these objections is entirely irrelevant, as no one postulates that down feathers seen in extant birds represent the original feather morphology in any context, whether thermoregulatory or aerodynamic. WebContour feathers grow in tracts (pterylae) separated by bare areas (apteria) and develop from follicles in the skin. Tail feather ornithology Britannica Other articles where tail …
Pterylae
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WebApr 8, 2024 · Pterylae definition: any of the tracts of skin that bear contour feathers , arranged in lines along the body... Meaning, pronunciation, translations and examples WebPterylae definition: any of the tracts of skin that bear contour feathers , arranged in lines along the body... Meaning, pronunciation, translations and examples LANGUAGE …
WebFrom the pterylae the feathers fan out and cover the remainder of the bird’s body. In passerines, the feathers are arranged in eight distinguishable tracts, with apteria (relatively bare skin) between them. Variations in tract width and length and especially differences in feather number and distribution are often useful in determining ... WebPterylae definition: any of the tracts of skin that bear contour feathers , arranged in lines along the body... Meaning, pronunciation, translations and examples
WebApr 8, 2024 · How to say pterylae in English? Pronunciation of pterylae with 1 audio pronunciation, 1 meaning and more for pterylae. Webarrangement of feathers. In feather. …areas of bare skin (apteria) between. The latter may contain the small soft feathers called down. Read More. In bird: Feathers. …separated by bare areas (apteria) and develop from follicles in the skin. Read More.
feather patterns of passerines. In passeriform: Plumage and pterylosis. …from relatively narrow tracts (pterylae) in the skin. From the pterylae the feathers fan out and cover the remainder of the bird’s body. In passerines, the feathers are arranged in eight distinguishable tracts, with apteria (relatively bare skin) … See more …arranged in feather tracts (pterylae) separated from one another by regions of almost naked skin (apteria). The only exceptions are the ostrichlike birds, the … See more …from relatively narrow tracts (pterylae) in the skin. From the pterylae the feathers fan out and cover the remainder of the bird’s body. In passerines, the feathers … See more
Webmpeters[at]pterylae.com Brief bio: Michael has over 10 years of experience working with GIS, code and graphic design in a variety of contexts. This synergy of design and code has … book club discussion little fires everywhereWebEtsy. Pterylae Designs offers finely woven Art and Jewelry made entirely from threads. You will see strong geometric designs in miniature patterns with an emphasis on color and … book club dinner menu ideasWebSep 9, 2016 · Areas of a bird’s skin where feathers are attached; also called pterylae. fecal sac A tough, flexible bag enclosing the feces of most passerine nestlings; it allows the parents to remove and dispose of the feces more easily—parents sometimes grab the fecal sacs as they emerge from a nestling’s cloaca. Many parents carry the sacs some ... god of mollywoodWebMar 30, 2024 · 1.1.1 实验材料 本实验所用水生植物材料为小水榕（Anubias nana）、金鱼藻(Ceratophyllum demersum）、黑藻（Hydrilla verticillata）、矮珍珠（Glossostigma elatinoides）、香菇草（Hydrocotyle vulgaris）、虎耳草（Saxifraga stolonifera）、南美青竹（Tradescantia albiflora）、绿菊（Cabomba ... book club discussion notesWebThe blushing of the Lesser Sulphur-crested Cockatoo is attributed to the presence of specialized feather muscles called pterylae. When these muscles are stimulated, they cause the feathers to erect and expose the bare skin beneath, which is then flushed with blood from capillaries close to the skin’s surface, resulting in the pink blush. god of money in chinaWeb(ornithology) One of the areas of a bird's skin on which feathers grow book club discussion for the lincoln highwayWebThe presence of pterylae and apteria, and differences among birds in their shape and distribution, may (1) be adaptations for reducing the total weight of the feathering, (2) better accommodate the movements of the body and the feathers, and (3) aid in thermoregulation via loss of body heat from apteria (Stettenheim 2000). god of money greek