Black and White Spiders of shaik Hamada???

[ArtHummer]

What is the purpose of this monstrosity???

White Spider:
[video=youtube_share;zCSFlP8f5so]http://youtu.be/zCSFlP8f5so[/video]

Black Spider:
[video=youtube_share;B4mM2aa19eY]http://youtu.be/B4mM2aa19eY[/video]

 

[Mb30sdl]

Sand travel, soft sand in SA.