By Jaime Wilson, Zoo Blog Keeper
The primate keepers recently received some new enrichment items, one of which is what they call a treat rattle. It's a cylinder of clear plastic with two chambers. There are holes in the bottom and holes in the middle level. You fill it with treats, in this case sunflower seeds and peanuts, and the primates have to figure out how to shake and roll the seeds through the different holes and out the bottom.
On a recent windy day, keepers hung two rattles in the White-face saki exhibit. They immediately started to investigate and could see the food but it took them a while to figure out that when they shook the containers, the food dropped to the ground.
To see the enrichment in action watch the video below or view it on Youtube.