If you’ve seen our lemurs up in Explore the Wild, you might have noticed that they have collars on their necks. Here’s a good picture of Lycus the Ring Tailed lemur where you can clearly see his collar:
Our Red Ruffed lemurs have them too, and both species wear them all the time. We put these collars on our lemurs for the same reason you put a collar on your dog: to help us get them back if they escape. But it’s not your usual dog collar with their name and our phone number. Instead, each collar has a little radio transmitter, and each one has a unique frequency that it puts out. It’s just like each collar is it’s own radio station, and we have a tracker that has an antennae that picks up the stations. So if Lycus were to escape, we would turn our tracker on the Lycus station (it doesn’t actually play music, but if it did, his would be mostly classical with swing and big band at night, and jazz on the weekends) and we would be able to hone in on his location.