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The 500 line segments defined above together form a shape in the Cartesian plane that resembles a bird with open wings. Looking at the line segments on the wings of the bird causes an optical illusion and may trick the viewer into thinking that the segments are curved lines. Therefore, the shape can also be considered as an optical artwork.
Characteristic of hanging parrots, the blue-crowned hanging parrot sleeps upside down by hanging from tree branches. The birds climb or fly up tall trees and will hang by either both feet or only one foot and will fluff their feathers and tuck their head and neck into their body. This behaviour evolved in order to limit nighttime predation.
The sharp-shinned hawk and other birds prey upon American bushtits. [4] Bushtits live in flocks of 10 to 40 birds and family members sleep together in their large, hanging nest during breeding season. Once the offspring develop wings that are developed enough to fly, they leave the nest and sleep on branches.
Look out for birds across Iowa on Thursday night. Hundreds of thousands of birds will fly through the state to head south for the winter.
Birds play an essential role in the ecosystem as pollinators drink nectar from flower to flower and move pollen, spreading seeds, which helps new plants germinate and grow and reduce unwanted ...
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