Cutting back the lanky stems of a prized shrub leads not only to a smaller bush, it also reinvigorates the whole plant, thickening it up as side branches are stimulated into growth.

ECONOMIST: Elk saliva stimulates plant growth

Bushwhacked is a follow-up to Shrub, the book Ivins and co-author Lou Dubose wrote in 2000 about the presidential candidate Bush.

NPR: 'Bushwhacked,' Ivins' Latest Take on the President

As its name implies, and notwithstanding the unusual suffrutex (dwarf shrub) forest that covers large areas at higher elevations, Liuwa is wide-open country, which allows for bush-loving nature lovers to witness animal interactions without affecting outcomes.

BBC: Birding in Zambia��s wild