Osprey Nest 2002

Columbia River, Oregon 2002

One of the largest birds of prey in North America, the Osprey eats almost exclusively fish. It is one of the most widespread birds in the world, found on all continents except Antarctica.

Description

  • Large raptor
  • White breast and belly
  • Black back and wings
  • Long wings, held with wingtips angled slightly backwards
  • Dark eyestripe
  • Crown and forehead white
  • Size: 54-58 cm (21-23 in)
  • Wingspan: 150-180 cm (59-71 in)
  • Weight: 1400-2000 g (49.42-70.6 ounces)

Sound

  • Calls are short, chirping whistles

Cool Facts

  • An Osprey may log more than 160,000 migration miles during its 15-to-20-year lifetime. Scientists track Ospreys by strapping lightweight satellite transmitters to the birds’ backs. The devices pinpoint an Osprey's location to within a few hundred yards and last for 2-3 years. During 13 days in 2008, one Osprey flew 2,700 miles—from Martha's Vineyard, Massachusetts, to French Guiana, South America.
  • Ospreys are unusual among hawks in possessing a reversible outer toe that allows them to grasp with two toes in front and two behind. Barbed pads on the soles of the birds' feet help them grip slippery fish. When flying with prey, an Osprey lines up its catch head first for less wind resistance.
  • Ospreys are excellent anglers. Over several studies, Ospreys caught fish on at least 1 in every 4 dives, with success rates sometimes as high as 70 percent. The average time they spent hunting before making a catch was about 12 minutes—something to think about next time you throw your line in the water.
  • The Osprey readily builds its nest on manmade structures, such as telephone poles, channel markers, duck blinds, and nest platforms designed especially for it. Such platforms have become an important tool in reestablishing Ospreys in areas where they had disappeared. In some areas nests are placed almost exclusively on artificial structures.
  • Osprey eggs do not hatch all at once. Rather, the first chick emerges up to five days before the last one. The older hatchling dominates its younger siblings, and can monopolize the food brought by the parents. If food is abundant, chicks share meals in relative harmony; in times of scarcity, younger ones may starve to death.
  • The name "Osprey" made its first appearance around 1460, via the Medieval Latin phrase for "bird of prey" (avis prede). Some wordsmiths trace the name even further back, to the Latin for "bone-breaker"—ossifragus.
  • The oldest known Osprey was 25 years, 2 months old.

https://www.allaboutbirds.org/guide/Osprey/id

Osprey Range

Range Map

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