Giant birds may help scientists finally solve the mystery of the Nazca lines

[wnylib]

2. The rest of the article suggests the why.

It says that the bird shapes might have been indicaters of where and how to locste water sources in the arid coatal plains where these shapes exist. The article was not very clear, though, about how the bird (or other animals) ponted to water sources. Also didn't say whether anybody tested the hypothesis by looking for water where it was supposed to be found.

The article did not mention the fact that other animal images at the site slso have origins in the Amazon rainforest, not the coastal plains.

My guesd is that the huge snimal drawings tell a visual history of the origins of the coastal plains dwellers.