It is 2018, the 4th of January. Myself and assistant DB are leopard-crawling through mud while clinging vines and thorn branches obstruct our mission: that being to locate the identity behind the primate “pyow” vocalizations at the site of the vervet monkey sleeping tree at 6.30 am.  “If only we could move through the trees the way they do”, DB says looking up into densely packed branches that stretch over forty metres high.