The hummingbird (305 feet), Friday, March 25, 2005, 9 AM.

"The bill of this bird ends at a group of lines, the last of which pointed to the rising sun on December the 21st." Maria Reiche, Mystery on the desert.

The Nazca Lines were made by removing the layer of iron-oxide coated pebbles that covered the desert surface. When this gravel was removed the pebbles drew a stark contrast with the light-colored soil underneath. The furrows made in the earth were drawn with great accuracy and it is likely that the Nazca people had both a thorough understanding of geometry and basic engineering, much like the ancient Egyptians. The drawings remain on the plateau after so many years due to the lack of wind, dry desert air and limited human interaction.
See also:
Isolines Art Illustration: Nazca Lines: the Hummingbird