These trackers on the legs remind of the 70 year old albatross https://news.ycombinator.com/item?id=38662454 which has the same tracker.
After all, all the other birds see humans staring, pointing, admiring the bird with it!
So the bird returning for 70 years, is just whichever bird that managed to kill and take the bauble for its own. I envision a bird arena, and Spock/Kirk fight music, all of it.
And here we just think it's the same bird.
The two are often conflated, to the detriment of us all.