(1) Instead, he went to Central America, where he could study the black howler - a leaf-eating monkey much like the langur .(2) Spotted deer, sambar, barking deer, chevrotian (mouse deer), wild pig, gaur, bonnet macaque and langur are the most preferred species.(3) These are home to several fauna like the endangered Nilgiri tahr, marten and primates like the langur .(4) Vietnam is host to several principal kinds of primates: gibbons (lesser apes), langurs and macaques (which are both monkeys), and lorises (which are prosimians).(5) Rare hoolock gibbons and capped langurs can be seen in the forests, and birds include giant hornbills and Bengal floricans.
