The advancement in DNA sequencing tech for humans, have been a boon for fighting extinction of other animals too. Sequencing bird DNA from feathers to determine their migration and check population was envisioned decades ago and has only been made possible recently to the advancement of the tech.

The Bird Genoscape Project[1] was also showcased in this excellent Nat Geo video[2].

[1]https://www.birdgenoscape.org/

[2]https://www.youtube.com/watch?v=_p43ksRgIlk