Tracking migration
Long-distance migration is studied using specialised techniques including individual marking and radio or satellite tracking.
Scientists attaching a GPS tracker to a pelican
Marking an animal requires you to capture and then tag it with a marker, for example metal leg rings. The animal will then undergo its migration and will have to be recaptured to gather the data.
Tracking involves a transmitter/geolocator being attached to the animal, such as a radio collar around the neck or ankle. A receiver picks up the signal being transmitted and the animal can be tracked to a precise location.
This technique also allows for the animal鈥檚 migratory path to be plotted and data can be transmitted without having to recover the transmitter.