Perlman, J. E., Chace, K. E., Jordan, J. et al. 2017. High-density polyethylene artificial turf is a durable foraging substrate for rhesus macaques. Laboratory Animal Science Professional 5(4) (December), 40-43.
In the wild, rhesus monkeys and other macaque species spend a majority of their waking hours searching for and eating food. For monkeys housed in runs and in caged settings, making species-typical foraging tasks available...