Complex sentence: Intensive poaching may have already driven Cambodia's national animal, the Kouprey, to extinction, and wild tigers, Eld's deer, wild water buffaloes and hog deer are at critically low numbers.
Split into simpler sentences: Intensive poaching may have already driven Cambodia's national animal, the Kouprey, to extinction. Wild tigers, Eld's deer, wild water buffaloes and hog deer are at critically low numbers.