Who goes ape ?

It’s true so true we do exist
Animals we are
Born to live where we were placed
Yes however far
Away from town or city
In a jungle full of trees
Family was our fortune
Amongst the birds and Bee’s

So many of us captured
We look a bit like you
Ideal for your experiments
Sadly that is true
All your fancy medicines
Injected into us
Shave us inject us
Watch us sicken
With eruptions full of pus