13 points
Birds are monitored by putting a ring on their leg. The ring can then be used to identify the bird if it’s captured or seen with a telescope/binoculars/camera by someone else, or if their carcass is found. Typically it’s just a small metal ring but these days multiple colored rings can also be used, those are put into a public database that anyone can use to identify the bird and see where it has been spotted, when it was ringed, how old it is etc.
4 points
![[Cool birb, but see comments. Not accurate.] Dinosaurs Still Live(mander.xyz)](https://mander.xyz/pictrs/image/9edb19ca-907a-4a3e-bc2b-e7b71f93fc41.jpeg){kind=link}