another dumb headcanon: superman is nice to birds because of course he is, and helps out birds who are in distress. also he can fly around with them. birds see a lot more of superman than they do of most people, basically. the unexpected consequence of this is that the crows of metropolis recognize superman as a friend. sometimes crows just follow him around like a weird flock, or try to give him shiny things. but mostly please just imagine luthor trying to gloat while threatening superman with kryptonite only to have a crow steal it. or just, generally, lex luthor getting attacked by crows. if that does not improve your day i don’t know what to tell you.