Parrots Wallpaper Colorful Parrot Bird Photos. The most obvious adaptation to flight is the wing but because flight is so energetically demanding birds have evolved several other adaptations to improve efficiency when flying Birds bodies are streamlined to help overcome air resistance Also the bird skeleton is hollow to reduce weight and many unnecessary bones have been lost such as the bony tail of the early bird Archaeopteryx along with the toothed jaw of early birds which has been replaced with a lightweight beak The skeleton s breastbone has also adapted into a large keel suitable for the attachment of large powerful flight muscles The vanes of each feather have hooklets called barbules that zip the vanes of individual feathers together giving the feathers the strength needed to hold the airfoil these are often lost in flightless birds The barbules maintain the shape and function of the feather.
From the trees down that birds ancestors first glided down from trees and then acquired other modifications that enabled true powered flight From the ground up that birds ancestors were small fast predatory dinosaurs in which feathers developed for other reasons and then evolved further to provide first lift and then true powered flight
. Bird farm birdman jr harvey birdman x gets the crest birds & bees gandaria .Posted in Bird by Jamie Wilgus at September 14, 2018. Gallery of Parrots Wallpaper Colorful Parrot Bird Photos :
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