- or barbs; the
barbs themselves are also
branched and form the
barbules.
These barbules have
minute hooks called barbicels for cross-attachment. Down feathers...
-
Pennaceous feathers also have much
smaller barbules branching from the
entire length of each barb;
these barbules have tiny
hooks along their length, which...
- 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...
-
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...
-
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...
- barb is
known as the ramus.
barbules Also, radius / radii;
tertiary fibres. Also defined:
proximal barbules;
distal barbules; barbicels;
hooklets (hamuli);...
- and
proximal barbules produce a closed,
pennaceous vane (a
contour feather). A
closed vane
develops when
pennulae on the
distal barbules form a hooked...
-
creation of
wingtip vortices,
thereby reducing drag. The
barbules on
these feathers,
friction barbules, are
specialized with
large lobular barbicels that help...
- the
barbules (fiber-like components) of the feathers,
produce the pea****'s colours. 2D photonic-crystal
structures within the
layers of the
barbules cause...
-
changes in a bird of
paradise caused by
uniquely structured breast feather barbules".
Proceedings of the
Royal Society B:
Biological Sciences. 278 (1715):...
