Rarest breed you've had success hatching, any birds

[Joyfillednomads]

I know certain areas need their native birds restored anyone hatch eggs for conservation efforts?

 

[JacinLarkwell]

Like for domestic poultry or actual wild birds?

 

[MadamContrary]

I've gotten permits to raise Bob White Quail for release twice. It was a real hassle and a lot of paperwork! Other than that there's not many that are legal for regular citizens to hatch, you have to be part of an organization or rehabilitation program.
Now, there's lots of heritage breeds that could use reviving, but they are to be kept not released.