Over christmas we also got to visit Nyungwe.  This time we saw orchids and not many animals.  Maybe we are louder on foot than in a car, or maybe the animals are just smaller in Nyungwe.  We did 2 different trails, Igishigishigi and of course Kamiranzovu swamp trail.  With the Igishigishigi trail we also did the canopy walkway about 80m above the forest floor.  It gave us amazing views.