Engineering

was on my way to work this morning, i noticed this couple building their house ...

the place seemed to me little risky, if the water goes high...but what do i know?! They know better...

 

the shot is simple, i didn't like to disturb them and get closer...but i was wondering what are those genes telling these animals what to build how to build where to build??? I was amazed by the ability of the swan picking up reed and trying to cut others ...nature is amazing!

Done