Quails

I've never eaten pigeons but one of these days I am going to catch one at my bird feeder . . . .

It's hard to tell scale here, but each of these quails is 12 - 15 cm long.

I expect that's a little more reliable (and probably healthy) than the wild urban pigeons. :)

Crows! That seems a little adventurous to my mind.

Around here many people used to eat sea gulls and "small birds" (which were any of several winter birds that would come to seeds scattered on the ground). In both cases, they were considered a last-resort sort of meal, not something you would eat if you had the money to buy or catch something better.