What does a pigeon eats?

Anything it believes it can eat. Pigeons alternatively known as 'Rats with wings'.

Scavengers. These birds would eat most types of food and any object it thinks looks like food. They have greedy traits and do not fear humans. Also they are not very bright and do not seem to learn.

I saw pigeon eatting corn. pigeons can eat plants, corn, seeds etc. they are quite bright because when they race they can find their way home!