| Increased plumage abrasion caused by a higher rate of preening could break feather barbules, leading to a reduction in plumage condition. |
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| That is, the main shaft of the barb, the ramus, has a branching pattern of barbules. |
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| Downy barbs that were initially sampled from the base of these feathers had microscopic characters that consisted of very long barbules. |
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| The barbs, in turn, may bear barbules which may hook on to the barbules of an adjoining barb. |
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| In contrast, a flight feather has narrow barbules which do not cover the barbs. |
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| Plumage of glandless birds was in significantly poorer condition, with more missing barbules, than the plumage of control birds with glands. |
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| Modern feathers evolved through the stages involving elongated scales that became broken up into barbs and barbules. |
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| A few species of hummingbirds and European Starling are known to produce UV hues with coherently scattering melanin arrays in feather barbules. |
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| Feathers, however bizarre or morphologically complex, consist essentially of a rachis, barbs, and barbules. |
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| Filoplumes have a rachis, with barbs and barbules somewhere along them, and they arise from follicles. |
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| Barbs can be separated from each other and smoothed back into place because barbules and barbicels act somewhat like a zipper. |
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| Two sets of barbules branch off from each barb and interlocked by means of tinier barbicels to give the feather great strength and smoothness. |
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| Bird feathers illustrate optimum design, with their interlocking barbs and barbules resulting in a strong yet extremely light structure. |
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| The barbules are the tiny feather tip structures that come off of barbs on either side of the central stem of peacock feathers. |
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| The strongly iridescent colors of bird feathers are produced by arrays of melanin granules in the barbules of feathers. |
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| It could possibly be confused with the rare bullhead catfish which has eight barbules, compared to the six barbules of the wels. |
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| Examine the amazing close-up of the barbules of a feather showing the tiny hooklets and grooves. |
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| In turn, the tips of the barbules have tiny hooklets that fit into grooves on adjacent barbules. |
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| Well known examples include the structural colors produced by brilliant iridescent butterfly wing scales and avian feather barbules, such as the peacocks tail. |
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| The vanes have parallel barbs, which suggests the presence of barbules. |
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| Some of its long feathers had barbules and hooklets that bound together a feather's barbs and gave the feather greater strength, flexibility and surface area. |
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| The soft downy feathers are of no use as proper wings, as the vanes do not have interlocking barbules. |
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| The down is made of long and fine barbs called barbules and contrary to the feather, has no shaft. |
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| If you look at a feather under a microscope, you see the main stem, with barbs coming out to the left and right, and from these you have left-and right-handed barbules. |
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| It has been my impression that the mechanism whereby the barb ridges separate from one another and sculpt out the barbules, probably involves many sequential changes. |
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| Accordingly, even though birds without uropygial glands preened at the same rate as birds with glands, the former may have suffered more breakage of feather barbules. |
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| Oil destroys the coat by clogging the barbs and barbules, allowing cold water to soak into the insulating down and reach the skin. |
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| In many birds, some or all of the feathers lack the barbules or the hooks, and the plumage has a loose, hairlike appearance. |
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| Iridescent colours result from the thinly laminated structure of the barbules and are enhanced by underlying melanin deposits. |
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| The barbs possess further branches —the barbules and the barbules of adjacent barbs are attached to one another by hooks, stiffening the vane. |
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| Structural origin of the brown color of barbules in male peacock tail feathers. |
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| The barbs, in turn, have branches, the barbules. |
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| Shake the fly to remove any excess powder, but the pinching has forced inside the powder particles and they are trapped between the barbules and cling to the feather. |
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| Feathers: organ composed of a supple shaft with barbs and barbules. The feathers cover the body of the bird, protecting it and maintaining its body temperature. |
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| The plumage in this coelurosaur differs from that observed in other dinosaurs, which show a reduced rachis with long barbs without any barbules, and DIP-V-15103 adds another morphotype to the diversity of early feathers. |
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| More spectacularly, the end of Protoarchaeopteryxs tail sported a fan of feathers that are vaned, suggesting the presence of barbules. |
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| Although microscopic evidence from fossil forms is scant, at some point the barbs evolved barbules, the tiny hooks that provide mechanical structure to the vanes and give them aerodynamic integrity. |
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| It gets it's name from the four barbules around its mouth which it uses for finding its food on the river bed. |
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| Feathers also have barbules that fit together almost like a zipper to keep the feather flat and smooth. |
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| The system works well because the bird spends much of its leisure nibbling at its feathers, cleaning off any specks of dirt and rehooking the barbules. |
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| The barbules on these feathers, friction barbules, are specialized with large lobular barbicels that help grip and prevent slippage of overlying feathers and are present in most of the flying birds. |
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