Posted: Nov 17, 2018 12:09 pm
In the OP photo, I notice at least three 'Silverbacks'. I thought that they would be territorial to the extent of not allowing any 'competition' in the same group. 
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=2663244#p2663244