Last edited by Nim
Tuesday, July 28, 2020 | History

2 edition of Ecology of bald eagles wintering near a waterfowl concentration found in the catalog.

Ecology of bald eagles wintering near a waterfowl concentration

Curtice R. Griffin

Ecology of bald eagles wintering near a waterfowl concentration

by Curtice R. Griffin

  • 269 Want to read
  • 25 Currently reading

Published by U.S. Dept. of the Interior, Fish and Wildlife Service in Washington, D.C .
Written in English

    Places:
  • Missouri,
  • Swan Lake Region.
    • Subjects:
    • Bald eagle -- Wintering.,
    • Bald eagle -- Food.,
    • Waterfowl -- Ecology.,
    • Predation (Biology),
    • Birds -- Ecology -- Missouri -- Swan Lake Region.

    • Edition Notes

      Bibliography: p. 11-12.

      Statementby Curtice R. Griffin, Thomas S. Baskett, Rollin D. Sparrowe.
      SeriesSpecial scientific report--wildflife ;, no. 247
      ContributionsBaskett, Thomas S., Sparrowe, Rollin D.
      Classifications
      LC ClassificationsSK361 .A256 no. 247, QL696.F32 .A256 no. 247
      The Physical Object
      Pagination12 p. :
      Number of Pages12
      ID Numbers
      Open LibraryOL3139898M
      LC Control Number82600072

      Each winter, two types of migrations take place at the Klamath Basin National Wildlife Refuge Complex. One involves the largest concentration of wintering bald eagles in the lower 48 states. ganochlorine pesticide, PCB, and PBB residues and necropsy data for Bald Eagles from 29 states, Pestici. Monit. J. LINGLE, G. R. AND G. L. KRAPU. Winter ecology of Bald Eagles in southcentral Nebraska. Prairie Nat. l& STEENHOF, K. The ecology of wintering Bald Eagles in southeastern South Dakota.

      Bald eagles are usually found near water, i.e. lakes, reservoirs, large ponds, salt- and freshwater marshes, shorelines, etc. where an adequent supply fish can be found. (Johnsgard , Hamel ) Their nest is usually in mature trees as it is one of the largest . hunting waterfowl. Bald Eagle wintering habitat is characterized by abundant, readily available food sources. Most wintering areas are associated with open water or waterfowl concentration areas, where eagles feed on fish or water-fowl. Wintering populations are also found on rangelands of the Davis Mountains, western Edwards Plateau.

      Community ecology is a key to understanding function in nature, but a unified agreement about how communities are ordered has been elusive. Indeed, convictions about their organization range widely. Bald eagle numbers remained comparatively low within the study area during the entire winter season. In the previous year at Keokuk, Iowa, the maximum count for wintering bald eagles observed in one day was (Dunstan et al. ), while the maximum day count during this investigation within this study area was only


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Ecology of bald eagles wintering near a waterfowl concentration by Curtice R. Griffin Download PDF EPUB FB2

Get this from a library. Ecology of bald eagles wintering near a waterfowl concentration. [Curtice R Griffin; Thomas S Baskett; Rollin D Sparrowe] -- Bald eagles (Haliaeetus leucocephalus) associate with wintering waterfowl concentrations throughout the United States, but little detailed information is available on eagle-waterfowl relations.

Get this from a library. Ecology of bald eagles wintering near a waterfowl concentration. [Curtice R Griffin; Thomas S Baskett; Rollin D Sparrowe].

Ecology of bald eagles wintering near a waterfowl concentration. U.S. Fish and Wildlife Service Special Science Report - Wildlife No. Grubb, T.

Ecology of bald eagles wintering near a waterfowl concentration / By Curtice R. Griffin, Rollin D. Sparrowe, Thomas S. Baskett and U.S. Fish and Wildlife Service. Abstract. For example in your area, the winter was very mild this year () and most of Lake Champlain was open all winter long, attracting and keeping wintering eagles there.

If you study the JN maps, you'll see a couple of our birds "short-circuited" (didn't go all the way south to where they were previously caught) and spent a lot of time up on Lake. This report concerns the ecology of bald eagles wintering in the vicinity of Swan Lake National Wildlife Referenc in north-central Missouri and, more specifically, examines the association of the eagles with waterfowl during the winters of, and   Ecology of Bald Eagles Wintering Near a Waterfowl Concentration.

United States Department of the Interior, Fish and Wildlife Service, Special Scientific Report No. Ecology of Bald Eagles Wintering Near a Waterfowl Concentration (Spec.

Sci. Rep. US Department of the Interior, Fish and Wildlife Service, Washington, DC. Google Scholar. platform for over journals and books published by nonprofit societies, associations, near a waterfowl concentration. Ecology of bald eagles wintering near a waterfowl concentration. We compared blood lead concentrations in samples from bald eagles ranging in age from to yr-old at Galloway Bay, Saskatchewan, Canada (n = 97) during October-November, and Hauser.

Brewster () reported Bald Eagles capturing water- fowl, including wild geese in flight, by swooping under the prey, turning upside down, and grasping the breast of the prey with its talons. Griffin et al. () during 3 seasons of field work saw many attempts by Bald Eagles to kill apparently healthy waterfowl.

inactive Bald Eagle nests sometimes host other bird species, such as Great-horned Owls or even Canada Geese. *Foraging locations: Most eagles feed primarily on fish and waterfowl, so easy access to a food source is key.

Raising young eagles is hard work: the little guys need a lot of food. Placing a nest near a food source means the. If you want to see lots of bald eagles, the Upper Klamath Basin on the Oregon-California border is the place to be in January and February. Colder weather brings flocks of waterfowl through the area and many stay for the winter.

In addition, water is flooded onto fields driving out rodents. Bald Eagles mate for life. Bald Eagles can fly up to 10, feet and soar there for hours. A mating pair will produce up to 3 eggs but may not all survive. Both male and female incubate the eggs. Bald Eagles used to be seriously endangered but made a come back in While hunting prey a Bald Eagle can dive at about miles per hour.

We examined the degree of lead exposure, based on tissue-lead concentrations, in raptors of 16 species found dead across Canada. The most prevalent species available for examination were Red-tailed hawks, Great horned owls, and Golden eagles (n=).

The majority of individuals examined had very low lead accumulation, however 3–4% of total mortality in these 3 most commonly encountered. In addition to the adverse effects of DDT, some bald eagles have died from lead poisoning after feeding on waterfowl containing lead shot, either as a result of hunting or from inadvertent ingestion.

Bywith only nesting pairs of bald eagles remaining, the species was in danger of extinction. Bald eagles return to their breeding territories in late winter, as soon as a food source is available.

The majority of wintering eagles are found near open water where they feed on fish and waterfowl, often taking the dead, crippled, or otherwise vulnerable animals. Mammalian carrion is also an important alternate source of food. At night. Population parameters: The population trend for wintering bald eagles in Illinois fluctuates but is probably fairly stable *58,59,60,61*; there is now limited nesting in southern Illinois *40,41,54*; little is known about longevity or length of sexual activity, a dead bald eagle in the wild was 27 years old and captive bald eagles have lived to.

Ingestion of lead shot and aluminum bands by Bald Eagles during winter in Nebraska.- The Bald Eagle (Haliaeetus leucocephalus) is a common winter resident along the Platte and North Platte rivers in southcentral Nebraska. Waterfowl are a major food of eagles during periods when fish are not readily available (Lingle and Krapu ).

This population is maintained by a combination of natural spawning and artificial propagation in concert with a regulated harvest of returning adults. Numbers of mainstem spawning Salmon have increased markedly in the past 10 years, and this has attracted increasing numbers of wintering Bald Eagles.

Approximately bald eagles wintered along a km section of the Platte and North Platte rivers in Nebraska during the winters of and A preponderance of the wintering eagles were adults, with the adult:subadult ratio highest during the harsh winter of Nocturnal roosts were located primarily in tree plantings near the river, with mean tree age at the roosts ranging.Ecology of bald eagles wintering near a waterfowl concentration.

U.S. Fish and Wildl. Serv., Spec. Sci. Rep.-Wildl. Free.3 inclusion in Current Literature and Recent Books sections for Volumes 11 and 12 should be sent to the new editor, waterfowl management plan for the United States. Available from: John Ellis, U.S. Fish.Most wintering areas are associated with open water or waterfowl concentration areas, where eagles feed on fish or waterfowl.

Wintering populations are also found on rangelands of the Davis Mountains, western Edwards Plateau, and the Panhandle, where eagles may take rabbits and feed on carrion.