Morning Carel,
I took a drive up to Seronera from Ndutu and I must say it is dry in the southern Serengeti, the Seronera valley and riversystem is also drying up and this video will show you how dry it has become.
Hoping for the long rains to come soon for relief all round. This is probably the reason why there has been a move towards the Grumeti River and its water.
Keep well,
Ainslie