When most people use the word “tag” usually they’re talking about a clothing label or a sticker on a banana, but more generally it’s a type of marker which identifies the item in some way. This is no different from the way we use the word except in this instance we are using a radio transmitter as a marker. A radio transmitter is an electronic device which sends information through radio waves, similar to radio stations used to broadcast music to your car. The radio transmitters used in the Motus Wildlife Tracking Network are specially designed to be as small and lightweight as possible, allowing scientists to attach them to small animals without harming them. The signal transmitted by these transmitters, or “tags”, contains a special code which uniquely identifies the device. This signal is picked up by radio receiver stations which are placed in strategic locations across the globe. To Learn more about these receiver stations, click here.