Currently working on a take on Pokémon GO + Pokémon Snap but for birding. The goal is to explore your neighborhood, find birds, take good photos of them all. Next month, I'll be doing an event to find a rare bird, excited to see how it goes!
Not sure if this meets your criteria, yet iNaturalist [1] is kind of "gamified". Has a rather large "bird" taxon observation amount. 38,393,861 observations, 11,165 species, 1,130,700 observers, 188,988 identifiers (people who identify species from your pictures)
When Romania announced that the Lesser Kestrel had returned after 100 years iNaturalist actually had several of the observations in the nearby area. [2]
Do you have any plans to provide this data to ornithological research groups? I know there's an annual event where people across the nation are encouraged to count the birds in their back yards and report it, so it seems like this kind of amateur birdspotting is valued in the scientific community.
It's still a small closed alpha, if anyone is interested: https://testers.birdlego.com
Here is a rough trailer of it: https://www.youtube.com/watch?v=yVpR8aafFjI