
Mourning echo. A pair of mourning doves at the Chicago Botanic Garden.
According to the Cornell Lab of Ornithology, mourning doves are common across the continental United States. They're graceful and small headed doves that are often seen perched on telephone wires (like the one below taken in New Buffalo, Michigan) .

Bird on a wire
... or foraging for seeds on the ground.

Fence sitter, this one taken in Cerritos, CA.
The mourning doves' coloration often match their open-country surroundings. Males and females have the same coloration. They’re delicate brown to buffy-tan overall, with black spots on the wings and black-bordered white tips to the tail feathers.

Amidst the green, Cedar Lake, Indiana.
Their soft, drawn-out woo-oo-oo-oo calls sound like laments. When taking off, their wings make a sharp whistling or whinnying.
You can see these birds nearly everywhere ... there's a pair of them flying around our building in Edgewater. Apparently, they're monogamous. I've seen one of them landing on my veranda of my 12th floor apartment!
Source: All About Birds from the Cornell Lab of Ornithology.