House Sparrow

One of the more common birds around the Americas is the English Sparrow or House Sparrow. Native to Europe and Asia it has spread throughout the world and is now the most widely distributed wild bird. While they have a wide range from
They're about 5-7 inches long with stubby dark beaks and stocky bodies. The males have a grey stripe on the top of their heads, a small black stripe from the beak to the eyes, brown mullet, black goatee, white to grey belly, and orangy-brown wings, back, and tail. The females are shaped the same but look like someone took a can of brown spray paint and shoddily covered up the colors of the male.
The easiest way to tell a sparrow from farther away is to wait for it to fly. A sparrow flies like a bird who's had one too many drinks - with all its bobbing up and down during flight.

They are fairly noisy birds and are fierce protectors of their nests. Beware: if you get too close to a nest you may be dive bombed.
They are seed eaters and frequently may be found on the ground eating.

As the name "house" may suggest these birds only truly thrive near people, they are rarely found in uninhabited forests and prairies but are easily found in grasslands and trees around homes and farms. These Sparrows were first introduced in Brooklyn in 1851 when they let loose about a hundred sparrows from England. By 1900 they had reached the Rockies, that's how well they acclimated.

-And when I say wide range, these little brown birds can be found from the Northwest Territories in Canada to Argentina (though not really in a chunk of northern South America).