Calf update

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No. 5 with her three-week-old calf.  The postpartum paranoia I mentioned in a prior post has dissipated and No. 5 no longer retreats when I approach.   
With approximately three months between the day our first bison calf was born and the day our final calf was born there is a considerable difference in appearance among the calves. 
No. 5's three week old calf interacting with one of the older calves.  Aside from being much smaller, very young calves are a lighter reddish-brown in color, keep their ears folded back, and tend to stay closer to their mothers. 

As the calf grows older the hair on its head and the back of its neck will darken and small horns will appear. 

Older calves are more independent, but they still have a very close bond with their mothers. 

The older calves will spend a lot of time grazing with the herd, but still come running to nurse when their mothers call to them.