Our first bison calf

This morning I was pleasantly surprised to find a tiny new addition to our bison herd. 
I first noticed something was different when I spotted the calf's head poking up through the grass.   Initially, I wasn't sure if I was imagining the calf was there, but then the calf stood up.  
The mother turns out to be No. 1. 
At one point the calf decided to do some exploring, but mom stayed close behind it. 
It doesn't wander too much though before returning to its mother. 
The mother, still passing the afterbirth in this photograph, is extremely nervous about me being around.  The closest I could get was 200 meters.