Mourning dove (Zenaida macroura)
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The Mourning Dove (Zenaida macroura) is a member of the dove family (Columbidae). The bird is also called the American Mourning Dove or Rain Dove, and formerly was known as the Carolina Pigeon or Carolina Turtledove. It is one of the most abundant and widespread of all North American birds. It is also the leading gamebird, with up to 70 million birds shot annually in the U.S., both for sport and for meat. Its ability to sustain such pressure stems from its prolific breeding: in warm areas, one pair may raise up to six broods a year. Its plaintive woo-oo-oo-oo call gives the bird its name. The wings can make an unusual whistling sound upon take-off and landing, and the bird is a strong flier, capable of speeds up to 88 km/h (55 mph).
Mourning Doves are light grey and brown and generally muted in color. Males and females are similar in appearance. The species is generally monogamous, with two squabs (young) per brood. Both parents incubate and care for the young. Mourning Doves eat almost exclusively seeds, but the young are fed crop milk by their parents.
There are five subspecies of Mourning Dove:
The ranges of most of the subspecies overlap a little, with three in the United States or Canada. The West Indian subspecies is found throughout the Greater Antilles. It has recently invaded the Florida Keys. The Eastern subspecies is found mainly in eastern North America, as well as Bermuda and the Bahamas. The Western subspecies is found in western North America and parts of Mexico. The Panamanian subspecies is located in Central America. The Clarion Island subspecies is found only on Clarion Island, just off the Pacific coast of Mexico.
The Mourning Dove is sometimes called the American Mourning Dove to distinguish it from the distantly related African Mourning Dove (Streptopelia decipiens). It was also formerly known as the Carolina Turtledove or Carolina Pigeon. The species' scientific name was bestowed in 1838 by French zoologist Charles L. Bonaparte in honor of his wife, Princess Zénaide. The "mourning" part of its common name comes from its call.
The Mourning Dove has a large range of nearly 11 million square kilometers (6.8 million square miles). The species is resident throughout the Greater Antilles, most of Mexico, the Continental United States, and southern Canada. Much of the Canadian prairies sees these birds in summer only, and southern Central America sees them in winter only. The species is a vagrant in northern Canada, Alaska, and South America. It has been spotted as an accidental at least seven times in the Western Palearctic with records from the British Isles (5), the Azores (1) and Iceland (1). In 1963, the Mourning Dove was introduced to Hawaii, and in 1998 there was still a small population in North Kona. The Mourning Dove also appeared on Socorro Island, off the Western coast of Mexico, in 1988, sixteen years after the Socorro Dove was extirpated from that island.
The Mourning Dove is a medium-sized, slender dove approximately 31 cm (12 in) in length. Mourning Doves weigh an average of 4 to 6 ounces. The elliptical wings are broad, and the head is rounded. Its tail is long and tapered ("macroura" comes from the Greek words for "large" and "tail). Mourning Doves have perching feet, with three toes forward and one reversed. The legs are short and reddish colored. The beak is short and dark, usually a brown-black hue.
The plumage is generally light gray-brown and lighter and pinkish below. The wings have black spotting, and the outer tail feathers are white, contrasting with the black inners. Below the eye is a distinctive crescent-shaped area of dark feathers. The eyes are dark, with light skin surrounding them. The adult male has bright purple-pink patches on the neck sides, with light pink coloring reaching the breast. The crown of the adult male is a distinctly bluish-grey color. Females are similar in appearance, but with more gray coloring overall. The iridescent feather patches on the neck above the shoulders are nearly absent, but can be quite vivid on males. Juvenile birds have a scaly appearance, and are generally darker.
All five subspecies of the Mourning Dove look similar and are not easily distinguishable. The nominate subspecies possesses shorter wings, and is darker and more buff-colored than the "average" Mourning Dove. Z. m. carolinensis has longer wings and toes, a shorter beak, and is darker in color. The Western subspecies has longer wings, a longer beak, shorter toes, and is more muted and lighter in color. The Panama Mourning Dove has shorter wings and legs, a longer beak, and is grayer in color. The Clarion Island subspecies possesses larger feet, a larger beak, and is darker brown in color.
Courtship begins with a noisy flight by the male, followed by a graceful, circular glide with outstretched wings and head down. After landing, the male will approach the female with a puffed out breast, bobbing head, and loud calls. Mated pairs will often preen each other's feathers.
The male then leads the female to potential nest sites, and the female will choose one. The female dove builds the nest. The male will fly about, gather material, and bring it to her. The male will stand on the female's back and give the material to the female, who then builds it into the nest. The nest is constructed of twigs, conifer needles, or grass blades, and is of flimsy construction. Mourning doves will sometimes requisition the unused nests of other Mourning Doves, other birds, or arboreal mammals like squirrels.
Most nests are in trees, both deciduous and coniferous. Sometimes, they can be found in shrubs, vines, or on artificial constructs like buildings, or hanging flower pots. When there is no suitable elevated object, Mourning Doves will nest on the ground.
The clutch size is almost always two eggs. Occasionally, however, a female will lay her eggs in the nest of another pair, leading to three or four eggs in the nest. The eggs are small and white. Both sexes incubate, the male from morning to afternoon, and the female the rest of the day and at night. Mourning Doves are devoted parents; nests are very rarely left unattended by the adults. When flushed from the nest, an incubating parent may perform a nest-distraction display, or a broken-wing display, fluttering on the ground as if injured, then flying away when the predator approaches it.
|Hatching and growth|
|Egg in nest||Nesting in progress||Squabs||A juvenile|
Incubation takes two weeks. Mourning Doves are strongly altricial, with the young, called squabs, being helpless at hatching and covered with down. Both parents feed the squabs pigeon's milk (dove's milk) for the first 3-4 days of life. Thereafter, the crop milk is gradually augmented by seeds. Fledging takes place in about 11–15 days, before the squabs are fully grown but after they are capable of digesting adult food. They stay nearby to be fed by their father for up to two weeks after fledging.
Mourning Doves are prolific breeders. In warmer areas, these birds may raise up to six broods in a season. This fast breeding is essential because mortality is high. Each year, mortality can reach 58% a year for adults and 69% for the young.
The Mourning Dove is monogamous and forms strong pair bonds. Pairs typically reconvene in the same area the following breeding season, and sometimes may remain together throughout the winter. However, lone doves will find new partners if necessary.
Mourning Doves eat almost exclusively seeds, which make up more than 99% of their diet. Rarely, they will eat snails or insects. Mourning Doves generally eat enough to fill their crops and then fly away to digest while resting. They often swallow grit such as fine gravel or sand to assist with digestion. The species usually forages on the ground, walking but not hopping. At bird feeders, Mourning Doves are attracted to one of the largest ranges of seed types of any North American bird, with a preference for corn, millet, safflower, and sunflower seeds. Mourning Doves do not dig or scratch for seeds, instead eating what is readily visible. They will sometimes perch on plants and eat from there.
Mourning Doves show a preference for the seeds of certain species of plant over others. Foods taken in preference to others include pine nuts, sweetgum seeds, and the seeds of pokeberry, amaranth, canary grass, corn, sesame, and wheat. When their favorite foods are absent, Mourning Doves will eat the seeds of other plants, including buckwheat, rye, goosegrass and smartweed.
Mourning Doves can be afflicted with several different parasites and diseases, including tapeworms, nematodes, mites, and lice. The mouth-dwelling parasite Trichomonas gallinae is particularly severe. While a Mourning Dove will sometimes host it without symptoms, it will often cause yellowish growth in the mouth and esophagus that will eventually starve the host to death. Avian pox is a common, insect-vectored disease.
The primary predators of this species are diurnal birds of prey, such as falcons and hawks. During nesting, corvids, grackles, housecats, or rat snakes will prey on their eggs. Cowbirds rarely parasitize Mourning Dove nests. Mourning Doves reject slightly under a third of Cowbird eggs in such nests, and the Mourning Dove's vegetarian diet is unsuitable for cowbirds.
Mourning doves sunbathe or rainbathe by lying on the ground or on a flat tree limb, leaning over, stretching one wing, and keeping this posture for up to twenty minutes. These birds can also waterbathe in shallow pools or bird baths. Dustbathing is common as well.
Outside the breeding season, Mourning Doves roost communally in dense deciduous trees or in conifers. During sleep, the head rests between the shoulders, close to the body; it is not tucked under the shoulder feathers as in many other species. During the winter in Canada, roosting flights to the roosts in the evening, and out of the roosts in the morning, are delayed on colder days.
The number of individual Mourning Doves is estimated to be approximately 475 million. The large population and its vast range explain why the Mourning Dove is considered to be of least concern, meaning that the species is not at immediate risk. As a gamebird, the Mourning Dove is well-managed, with up to 40-70 million shot by hunters each year.
References to Mourning Doves appear frequently in Native American literature. Mourning Dove imagery also turns up in contemporary American and Canadian poetry in the work of poets as diverse as Robert Bly, Jared Carter, Lorine Niedecker, and Charles Wright