Drill

Old enclosure opposite entrance, Bristol, 1st October 2012

Am I stating the obvious here?- but he doesn't look castrated to me!

Though I am sure the 'Hanover Five' males living at Woburn were, unless it wasn't all of them?

I know what you mean. Perhaps he is an entire male but not fully mature or vasectomised, but I would expect to see much brighter blue and purple skin on an adult male. On two visits I have only had clear views when he is in this type of position.
The other male looks younger and there is nothing visible from behind when he is standing.

Alan

gentle lemur said:

Perhaps he is an entire male but not fully mature or vasectomised, but I would expect to see much brighter blue and purple skin on an adult male.

Click to expand...

You are right about the skin colour and he also seems to lack the bright scarlet/pink 'lipstick' on the underlip which adult males normally have.

I can't remember how old these males are now, though he does look adult in other respects.