The true majesty of a bird can only be seen entirely when it is captured in flight. In general, this presents technical and artistic challenges to the photographer. Whether it is the hummingbird flying at 50 kilometers an hour and 60 wing beats a second or a wedge-tailed eagle (Aquila audax) gliding over the salt lakes of the interior of Australia—when captured properly, they pass a serene and poetic image like no other animal. Photographs of large flocks, for example of Australian parrots, can resemble impressionistic paintings full of depth and movement. Hummingbirds frozen in flight together with dew-dropped flowers at times look like 3D sculptures. The scale-throated hermit (Phaethornis eurynome), while sitting on a branch, can sometimes appear dull and inconspicious, but once captured hovering and feeding on delicate flowers, its full splendor can truly be seen. The blue and yellow macaw (Ara ararauna) of Brazil is one of the most beautiful birds in the world. Measuring more than a meter in length, it glides and flies through the usually dry and harsh landscapes in a dance of technicolored poetry. Many birds give the impression they are swimming through an invisible liquid or performing a highly synchronized ballet that has been planned and written through the echoes of time. Buy Poetry in the Sky by Christian Spencer here.