![]() Fish and Wildlife Service Home Page |Ībout the U.S. The Feather Atlas illustrates feathers in ventral view only when the under surface is very different from the upper surface (e.g., in Black and Turkey Vultures). Ventral: the under surface of the body, or of any body part oriented in a normal horizontal postion. The posterior vane is the trailing edge of the feather. On remiges, the anterior vane is on the forward side of the rachis (the leading edge). Vane: the smooth feather surface formed by the interlocked pennaceous barbs. Tertial: the innermost flight flight feathers of the wing, attached to the humerus bone in the bird's upper arm. If obvious, usually indicates that a feather is from waterfowl. Tegmen: a shiny or waxy-looking patch along the shaft on the underside of primaries of waterfowl and some gamebirds, gulls, and owl. In such species, age is often estimated by plumage stage (e.g., Subadult I, II, and III for Bald Eagles). Subadult: a bird that is not fully adult, in species that require more than one year to achieve adult plumage (e.g. ![]() Secondary: one of the wing's inner flight feathers, which are attached to the ulna bone in the bird's "forearm." The number of secondaries varies from 9-25 depending on the species. Rectrices: the flight feathers of the tail. Remiges: the flight feathers of the wing, including the primaries, secondaries, and tertials. Rachis: the upper portion of the feather shaft, to which the barbs are attached. Primary: one of the wing's outer flight feathers, which are attached to the fused bones of the bird's "hand." Most bird species have 9-10 primaries. Plumulaceous Barbs: barbs without interlocking barbules, forming a loose fluffy layer at the base of a contour feather or making up the entirety of a down feather. Pennaceous Barbs: barbs with interlocking barbules that form a coherent vane. Notch: a distinct narrowing in the posterior vane of a primary flight feather. The endometrium measured 13.6mm thick and both ovaries 3.41. Immature: a young bird in its first year, before it has acquired adult plumage. I did an ultrasound scan and the report reveals a normal size and anteverted uterus measuring 11.1 5.0 6.1 cm in size and 176.2cm3 by volume. Most scans in the Feather Atlas illustrate the feathers in dorsal view, showing the upper surface of the feathers.Įmargination: a distinct narrowing in the anterior vane of a primary flight feather.įlight Feathers: the large wing and tail feathers that provide lift and maneuverability in flight (see "Remiges" and "Rectrices"). In some birds, such as eagles, these are large enough to merit illustration in the Feather Atlas.ĭorsal: the upper surface of the body, or of any body part oriented in a normal horizontal position. ![]() Those on the upper (dorsal) surface of the body are called upper wing and upper tail coverts those on the under (ventral) surface are called under wing and under tail coverts. Sometimes called the quill.Ĭontour Feathers: the feathers forming the bird's outer body covering, including the flight feathers and the overlapping body feathers that produce the bird's smooth aerodynamic shape.Ĭoverts: the contour feathers that cover the bases of the flight feathers. In some birds, such as Bald Eagle, these are large enough to merit illustration in the Feather Atlas.īarb: an individual strand of feather material (keratin), extending laterally from the rachis.īarbule: a lateral branch of a feather barb.Ĭalamus: the hollow inner portion of the feather shaft that lacks barbs and attaches to the skin. The stomach bubble forms a window through which this part of the lung is visible on the left.Axillaries: feathers in the axilla ("armpit") of the bird. It is important to be aware that the lowest portion of the lungs – which occupy the posterior costophrenic recesses – extend below the level of the contours of the hemidiaphragms. The stomach is frequently visible as a gas-filled 'bubble' below the left hemidiaphragm. The stomach and spleen are located immediately inferior to the left hemidiaphragm. The liver is located immediately inferior to the right hemidiaphragm. The right hemidiaphragm is usually a little higher than the left. Each hemidiaphragm should appear as a smooth, domed contour. The abdominal organs are more dense (whiter) than the air-filled lungs (blacker). The diaphragm separates the lungs from the abdominal organs. The hemidiaphragm contours do not demarcate the lowest part of the lungs The mean and SDs of the cell count for each of these 3 categories in 3 sections from each of the patients with SALS or FALS and the control cases and in 5 sections from each of the mouse groups were determined we then calculated the percentage of cells in each category.The stomach and spleen are located inferior to the left hemidiaphragm.The liver is located inferior to the right hemidiaphragm. ![]() The right hemidiaphragm is slightly higher than the left.Each hemidiaphragm should be well defined.The hemidiaphragms are domed structures.
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