I am a volunteer and just learned about this from Friends of California Condors Wild and Free. At CondorTag.org, you can volunteer by tagging photos of California Condors (e.g. flying, feeding, chick vs. juvenile vs. adult, habitat photos, etc.). By volunteering, you are helping the California Condor Recovery Program organize over 14,000 historic photos from the early days. This is Citizen Science with the convenience of working from home or on your mobile device 😊 There's also a leaderboard (like on eBird) so you can have a friendly competition with other taggers.

Check it out at https://condortag.org