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]

[1] https://www.inaturalist.org/observations?subview=map&taxon_i...

[2] https://www.inaturalist.org/observations?subview=map&taxon_i...

I guess it's not intensely gamified, but I have a couple friends at like 80-90% on Merlin. It's their excuse to travel and live abroad

This is actually exactly what I’ve been working on as a passion project for the last year and a half: https://apps.apple.com/us/app/wings-whistles/id6503321263

It’s basically a gamified version of Merlin. Would love any and all feedback!

Birdle Go seems really cool, very impressed and would love to test that!

What’s missing from eBird?