Birds Body Covering
Many birds have feathers. when a bird is born, since birds lay eggs, they have not yet grown Their feathers. their feathers are mostly used to fly. they are also used to stay warm. hunters hunt birds for their feathers. We should stop hunting these beautiful creatures. Down feathers:
"Up to the challenge of keeping birds warm are the down feathers. In down feathers, the rachis is either missing completely or substantially reduced in length. The barbules lack hooks, which combined with the lack of rachis, results in a very soft and fluffy feather. Without the hooks, the barbs and barbules create a puffy tangle of insulating air pockets."
Taken from:
http://www.birds.cornell.edu/AllAboutBirds/studying/feathers/feathers
"Up to the challenge of keeping birds warm are the down feathers. In down feathers, the rachis is either missing completely or substantially reduced in length. The barbules lack hooks, which combined with the lack of rachis, results in a very soft and fluffy feather. Without the hooks, the barbs and barbules create a puffy tangle of insulating air pockets."
Taken from:
http://www.birds.cornell.edu/AllAboutBirds/studying/feathers/feathers
The combination of light weight, strength, and shape--combined with precision control--is largely responsible for giving birds their special ability of sustained flight. Readers interested in learning more about feathers and how birds fly are invited to participate in the Cornell Lab of Ornithology's acclaimed Home Study Course.
Taken from:
The combination of light weight, strength, and shape--combined with precision control--is largely
Taken from:
The combination of light weight, strength, and shape--combined with precision control--is largely