House sparrows – those little brown and gray birds that flash mob the bird feeder – are common and easy to see. They’re quarrelsome, noisy, and when they’re on the ground, they move in vigorous hops that remind me of popcorn popping out of a pan.
They’re also an invasive species, scavengers that have hitched their wagons to humans, and at least on this continent, are having a very successful ride. Our farms, lawns, and grocery store parking lots provide all kinds of year-round foraging for these birds, and our structures provide them shelter. From gutter pipes to the bulb rims of traffic lights, house sparrows know how to make themselves at home in human-dominated settings, regardless of whether humans want them there. » Continue Reading.