Bird Integumentary system

what are the two main parts of a feather? what is a feaher made of?

Feathers are modified scales made of keratin, consisting of a shaft and vain

what are contour feathers used for?

flight

what Feathers have a rachis but no firm vane, providing insulation and buoyancy?

semiplunes

what feathers dont have a rachis?

down feathers

What feathers have a long rachis, few barbs, and are found near eyes, ears, nose, and mouth? What are they used for?

bristles, used for air filtration and food funneling

What feathers have a long bare rachis and barbs at the end? What are they generally used for? What is an example of one?

filoplumes, enhancing reproductive behavior, e.g., peacock tail feathers

During steep dives, what bird has been clocked at over 200 mph?

peregrine falcons

what are the two pieces of the feather shaft?

the calamus and the rachis

what part of the feather is the calamus? what is it also called?

the cylindrical hollow base, also called the quill

what part of the feather is squarish, solid, and in the middle of the vain?

the rachis

what part of the feather has branches extending from the rachis called barbs?

the vain

what are a barbs branches called?

barbules

feather barbules have hooklets (or humuli) that do what?

allow them to interlock velcro-like and increases strength

what are the three structures pointed out in this feather?

calamus

rachis

barbs

What feather is this?

filoplume

what feather is this?

bristle

what feather is this?

downy feather

what feather is this?

contour

what feather is this?

flight

what feather is this?

semiplume