Why is There No Bones or Remains or Photos?

When I have been exploring the forests in my state why haven't I found bones of deer or elk?  Coyote?  Beaver?  Bear?  Turkey Vultures? Or other animals that is known?  There must be no deer or other animals in the woods since I haven't found any bones or remains.

Nature has a cleaning system in place to keep the environment safe for creatures and plants.  Things decompose or are eaten in a short period of time.    

If you have a small number of a type of animal in the forest, the chances of finding anything is very slim.  It is luck more than anything else.  It took  a wildlife photographer 2 years to film a few minutes of the snow leopard in the wild.  Most films on wildlife is a collection of shots by the photographers over a period of time.  It takes time, patience, lucky timing and careful placement of the photographer.  Why should this be different for a bipedal primate?

The bipedal primate here in North America is smart.  I am talking human smart.  They have been eluding detection for over 400 years.  I think it is part of their DNA.  Humans have not been very smart in detecting this primate.  Using techniques on regular wildlife will not work.  The proof is what we have so far.  We need to rethink our strategies and think smarter.  This is easier said than done.