After rain, pigeons often flock to grassy areas and people often wonder what they are doing there.
Well, some time ago, I was on a camp site with lots of pigeons. Mostly wood pigeons, no rock doves (city pigeons).
They were very relaxed and walked up very close to the tent with me sitting in the opening, while they foraged.
I saw one eat an entire worm, but I noticed that they also actually eat the tips of grass.