The house sparrow is basically a seedeater, but it will eat a wide variety of food, including shoots, flowers and insects. House sparrows often come to feeders, as you can see, and make a good living from food put out for birds in yards and parks. They do eat bread I throw out on the lawn.
In spring, males sparrows will chase each other chirping wildly, and mill about, apparently fighting. The object of the fuss in one female, who fends the suitors off, aided by her chosen mate. The nest may be no more than a lining of feathers brought by both sexes, and is used through the winter. The usual nesting site is a hole or crevice in a building.