- or barbs; the
barbs themselves are also
branched and form the
barbules.
These barbules have
minute hooks called barbicels for cross-attachment. Down feathers...
-
number of
flattened barbs, that are
connected to one
another with
barbules. The
barbules are tiny
strands that criss-cross on the
flattened sides of the...
- that
involves the use of the beak to
position feathers,
interlock feather barbules that have
become separated,
clean plumage, and keep
ectoparasites in check...
-
feather types. It has a
short or
vestigial rachis (shaft), few barbs, and
barbules that lack hooks.
There are
three types of down:
natal down, body down and...
- and
nostrils and on its neck with
barbules closer together. They are
stiffer with more
hooks and
nodes for
barbules to
attach to one another, yielding...
- In
stage IIIb,
barbules paired within the
peripheral barbule plates of the barb ridges,
create branched barbs with rami and
barbules. This resulting...
-
which he
termed "structural colors." In 1923, C. W.
Mason noted that the
barbules in the pea****
feather were made from very thin layers. Some of
these layers...
-
flight feathers in
modern birds, with
vanes given stability by a barb-
barbule-barbicel arrangement. The tail
feathers were less asymmetrical,
again in...
- the
barbules (fiber-like components) of the feathers,
produce the pea****'s colors. 2D photonic-crystal
structures within the
layers of the
barbules cause...
-
creation of
wingtip vortices,
thereby reducing drag. The
barbules on
these feathers,
friction barbules, are
specialized with
large lobular barbicels that help...
