Your question about "pigeon" and "dove" had me thinking and I found the following:
Do you know how to tell the difference between a dove and a pigeon? Most people would answer this question affirmatively. Yet it may come as a surprise that there are very little, if any, differences between the two species!
Pigeons and doves are both members of a bird family of about 289 species, some of which are found in almost every non-polar country of the world. Many of these birds have been domesticated and thrive in close proximity to man.
Scientifically speaking, there is no difference between a pigeon and a dove. Sometimes the names are used interchangeably. For instance, the common fan-tailed street pigeon of North America is known as a domestic pigeon and also as a rock dove. These domesticated birds occasionally leave their urban life and live in a wild state.
Except for color and size pigeons and doves are much alike the world over. Some are subdued in hue; some have gaudy metallic coloring. Some are sparrow-sized; some are as large as a gamecock. However, all have stout bodies and strong, pointed wings. All are monogamous and show much attention to the mate. All have deep, cooing calls. The pair always cooperate in building their frail nest, incubating the one or two eggs, and caring for the young. For a week or so the young are fed on pigeon's milk, a substance formed in the lining of the adult bird's crop during the breeding season. The parent delivers this food by inserting its bill into the young bird's bill. Later the young are fed on fruit and berries.
One curious difference between pigeons and most other birds is their manner of drinking. Most birds must sip water and then raise the head so the water will run down the throat. Pigeons and a few related birds, however, can take a deep drink and swallow it without raising the head.
North America has various somewhat similar species, mostly in the southern areas, known as white-crowned pigeon, band-tailed pigeon, white-winged dove, ground dove, ringed turtledove, and Inca dove. The most widespread is the mourning dove, which has a long pointed tail. It is found from Canada to Panama.
Historically the most famous pigeon is probably the now extinct dodo bird. Another famous species, the passenger pigeon, is also extinct. In the 19th century it was abundant in the Mississippi Valley. A hunter reported seeing a flock 5 miles long and a mile wide. When the birds settled for nesting, they covered an area 28 miles long and 3 to 4 miles wide. Every tree was occupied, some of which were so loaded that branches fell under the weight of the nests and birds. Hunters everywhere were merciless in their slaughter of the birds and even used them as food for pigs. The numbers dwindled rapidly, until the last passenger pigeon, a captive, died in 1914.
Emerald-spotted Wood Dove (42)