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The following is a glossary of common English language terms used in the description of ... As a rule, this glossary does not contain individual entries on any of the ... (pigeons and doves)—afterfeathers can significantly increase the insulative ..... down feathers that lie underneath the outer contour feathers on a bird's body.


Hooks increase the strength of contour feathers because it allowsthem to interlock with each other. The process works similar toVelcro.


feather-covered bodies enables them to fly efficiently. Although a number of .... How do hooks increase the strength of a contour feather? 3. Down feathers are ...


In this investigation you will examine bird feathers and eggs. You will also ... How do hooks increase the strength of a contour feather? Part C: Comparing Bid ...


narrow, stiffer vane edge towards to wind for strength. covered along the leading edge by smaller contour feathers called coverts which shape the airfoil ... Feathers on the alula can spread to make an exta slot and increase lift. ... Streamlining with barbs, barbules and hooks ...


All About Feathers Unique to birds and their dinosaur ancestors, feathers have ... I have a bird with PBFD so I'm trying to learn everything I can about feather ...


Britannica does not currently have an article on this topic. ... The typical contour feather consists of a tapered central shaft, the rachis, with paired branches ... The barbules on the distal side of each barb have hooks (hamuli) that engage the ...


Sep 16, 2011 ... The combination of light weight, strength and shape, as well as precision control, ... Each contour feather can be controlled by a set of specialised muscles, which ... The barbules have hooks that lock the barbs together.


To do these things, the body must be light in weight and very strong. ... many ways in which an eagle's body combines low weight with high strength. ... A Bald eagle has more than 7 thousand feathers, but all of them put together ... "Blue Feathers" Secondary feathers can be moved down to increase drag, or up to reduce it.


For example, the 'complex morphology' of the flight or contour feather includes a long shaft (usually hollow, ... Though nearly weightless it has strength. ... The hook of the barbules can clearly be seen. ... to provide insulation by a gradual increase in the size and the protofeather traits of scales.22 Known as the insulation ...