Post by Kai on Jul 14, 2007 17:10:41 GMT -5
The common raven (Corvus corax) is a member of a family of birds known as the Corvidae, which includes jays, crows, and magpies. The raven is found throughout most of the Northern Hemisphere in many types of habitats. The raven is a permanent resident in Alaska, nesting from the Seward Peninsula and the Brooks Range throughout the mainland, south to Kodiak Island, throughout the Aleutian Chain and along the coast and mountains of Southeast Alaska.
General description: The raven is the largest species of songbird and largest all-black bird in the world. In Alaska, the raven can only be confused with a hawk or crow. Ravens have large, stout bills, shaggy throat feathers, and wedge-shaped tails, visible best when in flight.
Ravens are excellent fliers, engaging in aerial acrobatics and sometimes soaring to great heights. Flight is often an alternation of wing flapping and gliding and is deceptively fast, as ravens move quickly with seemingly slow wing beats. There is no mistaking the raucous call of the raven; the deep, resonant “kaw” is its trademark. However, the raven can produce an amazing assortment of sounds. One study in Alaska showed ravens have more than 30 distinct vocalizations.
Life history: Ravens probably first breed at 3 or 4 years of age and mate for life. Ravens are probably very long-lived in the wild; one captive bird died of old age at 29 years.
Ravens in the Interior begin displaying courtship behavior in mid-January, and by mid-March adult pairs are roosting near their nesting locations. The female lays from 3 to 7 eggs. Only the female incubates the eggs; she is fed by the male while on the nest. The chicks hatch after about three weeks and grow quickly, leaving the nest about four weeks after hatching. Both parents feed the young by regurgitating food and water which is stored in a throat pouch. In the Interior, young ravens leave the nest by the first week of June.
Ravens often form loose flocks during the day and congregate for roosting at night. As many as 800 ravens have been seen in one roost near Fairbanks.
Ravens do not undertake long migrations like many birds, but breeding birds usually relocate for nesting each year.
When not breeding they may travel 30 to 40 miles each day from roost to daytime feeding areas.
Food habits: Ravens consume a wide variety of both plant and animal matter. They are notorious scavengers and are at times predatory on small animals. They are common visitors to garbage dumps. Ravens will hide or cache food supplies. They also have the habit, like most hawks and owls, of regurgitating undigestible food in the form of a pellet. An analysis of hundreds of raven pellets from Umiat, Alaska, indicated that 50 percent of the raven's winter diet consisted of live prey (mostly small mammals) captured by ravens.
Relationships and importance to man: Long evoking strong emotion from man, the raven has often played important roles in cultures, mythologies, and writings. Ravens disobeyed Noah during the great flood by failing to return to the ark after being sent to search for land. The raven was used as an emblem by raiding Viking warriors in Europe, and has been written-up in countless disparaging ways in western literature.
Conversely, in Norse mythology, the god Odin used two ravens named Thought and Memory, to fly the world each day in order to inform him of what was happening.
The spiritual importance of the raven to Alaska's Native people is still recognized. The Tlingit, Haida, Tsimshian, BellaBella, and Kwakiutl all viewed the raven as the creator of the world and bringer of daylight. The raven is also important in the creation of myths by the Eskimo. The myths of the raven remain a significant social and religious component of Alaska culture.
Various species of Corvids have been persecuted for damage done to man's crops or favored species of game birds. Ravens have been known to kill sickly young farm animals. More often, however they are probably scavenging on animals killed by other predators. Additionally, ravens have reportedly killed reindeer calves kept by Eskimos.
Ravens are common in Alaska and often congregate near human settlements during non-breeding times. They can be minor nuisances by scattering unattended garbage and stealing food set out for dogs. They will come to baited traps, which is unfortunate for trapper and bird alike.
Management: The Migratory Bird Treaty between the United States, Canada and Mexico was amended in 1972 to include the Corvids, thus giving federal protection to these species.
Text: Mark Schwan
Revised and reprinted 1994
All of the above text is from the ADF&G Wildlife Notebook Series, and is in no way mine. The original source can be found at the following link: www.adfg.state.ak.us/pubs/notebook/notehome.php
General description: The raven is the largest species of songbird and largest all-black bird in the world. In Alaska, the raven can only be confused with a hawk or crow. Ravens have large, stout bills, shaggy throat feathers, and wedge-shaped tails, visible best when in flight.
Ravens are excellent fliers, engaging in aerial acrobatics and sometimes soaring to great heights. Flight is often an alternation of wing flapping and gliding and is deceptively fast, as ravens move quickly with seemingly slow wing beats. There is no mistaking the raucous call of the raven; the deep, resonant “kaw” is its trademark. However, the raven can produce an amazing assortment of sounds. One study in Alaska showed ravens have more than 30 distinct vocalizations.
Life history: Ravens probably first breed at 3 or 4 years of age and mate for life. Ravens are probably very long-lived in the wild; one captive bird died of old age at 29 years.
Ravens in the Interior begin displaying courtship behavior in mid-January, and by mid-March adult pairs are roosting near their nesting locations. The female lays from 3 to 7 eggs. Only the female incubates the eggs; she is fed by the male while on the nest. The chicks hatch after about three weeks and grow quickly, leaving the nest about four weeks after hatching. Both parents feed the young by regurgitating food and water which is stored in a throat pouch. In the Interior, young ravens leave the nest by the first week of June.
Ravens often form loose flocks during the day and congregate for roosting at night. As many as 800 ravens have been seen in one roost near Fairbanks.
Ravens do not undertake long migrations like many birds, but breeding birds usually relocate for nesting each year.
When not breeding they may travel 30 to 40 miles each day from roost to daytime feeding areas.
Food habits: Ravens consume a wide variety of both plant and animal matter. They are notorious scavengers and are at times predatory on small animals. They are common visitors to garbage dumps. Ravens will hide or cache food supplies. They also have the habit, like most hawks and owls, of regurgitating undigestible food in the form of a pellet. An analysis of hundreds of raven pellets from Umiat, Alaska, indicated that 50 percent of the raven's winter diet consisted of live prey (mostly small mammals) captured by ravens.
Relationships and importance to man: Long evoking strong emotion from man, the raven has often played important roles in cultures, mythologies, and writings. Ravens disobeyed Noah during the great flood by failing to return to the ark after being sent to search for land. The raven was used as an emblem by raiding Viking warriors in Europe, and has been written-up in countless disparaging ways in western literature.
Conversely, in Norse mythology, the god Odin used two ravens named Thought and Memory, to fly the world each day in order to inform him of what was happening.
The spiritual importance of the raven to Alaska's Native people is still recognized. The Tlingit, Haida, Tsimshian, BellaBella, and Kwakiutl all viewed the raven as the creator of the world and bringer of daylight. The raven is also important in the creation of myths by the Eskimo. The myths of the raven remain a significant social and religious component of Alaska culture.
Various species of Corvids have been persecuted for damage done to man's crops or favored species of game birds. Ravens have been known to kill sickly young farm animals. More often, however they are probably scavenging on animals killed by other predators. Additionally, ravens have reportedly killed reindeer calves kept by Eskimos.
Ravens are common in Alaska and often congregate near human settlements during non-breeding times. They can be minor nuisances by scattering unattended garbage and stealing food set out for dogs. They will come to baited traps, which is unfortunate for trapper and bird alike.
Management: The Migratory Bird Treaty between the United States, Canada and Mexico was amended in 1972 to include the Corvids, thus giving federal protection to these species.
Text: Mark Schwan
Revised and reprinted 1994
All of the above text is from the ADF&G Wildlife Notebook Series, and is in no way mine. The original source can be found at the following link: www.adfg.state.ak.us/pubs/notebook/notehome.php