Crab-eating macaque findings. One of the most well known examples of experiments on crab-eating macaques is the 1981 Silver Spring monkeys case. In 2014, 21,768 crab-eating macaques were imported in the United States to be used in experimentation. The crab-eating macaque has the third-largest range of any primate species, behind only humans and rhesus macaques. The IUCN Red List categorizes the species as Least Concern, and CITES lists them as Appendix II ("not necessarily threatened with extinction", in which trade must be controlled to avoid use incompatible with their survival). A recent review of their populations suggests a need for better monitoring
The Other Man's Grass Is Always Greener advance single. This track: "The Other Man's Grass is Always Greener" — which Hatch says contains "a lot of deep thought [and] a lot of philosophy... [Clark] enjoyed singing those kind of songs" — was musically similar to "Don't Sleep in the Subway" but failed to approach that hit's success, reaching only #31 on the Hot 100 in "Billboard" for the last week of December 1967 and the first week of January 1968. The song did best on the Easy Listening chart, where it reached a peak of number three. In the UK "The Other Man's Grass (is Always Greener)"