What can I feed the cranes in my neighborhood

You don't need to feed them anything. They are wild and will find all the food they need wherever they fly to.

According to 'Florida Sandhill Cranes: A Threatened Species', "They are omnivorous, meaning they eat a variety of plant and animal matter. Some of their favorite meal items include seeds, plant tubers, grains, berries, insects, earthworms, mice, snakes, lizards, frogs and crayfish. Unlike other wadingbirds, such as herons, sandhill cranes do not "fish."" I hope this helps.