Preview

Barn Owls Case Study

Satisfactory Essays
Open Document
Open Document
66 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Barn Owls Case Study
Within the mid-1800s the human population began to increase rapidly, so strategies including intense land maintenance were introduced to fulfil the agricultural demand. The barn owl’s population decreased by 69% in 1932 due to habitat loss reducing reproduction and food availability. Chlorinated hydro-carbons were introduced as a pesticide, although the agent displayed a toxic effect towards both predators and prey species so mortality rates were

You May Also Find These Documents Helpful

  • Good Essays

    Bald Eagle Research Paper

    • 428 Words
    • 2 Pages

    The female and male bald eagle have blackish brown feathers on their back and breast. A bald eagle has a white hood, neck, and tail. Eagle eyes are bright yellow. Most Bald Eagles have an estimated 7,000 feathers.…

    • 428 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Agriculture was first started around the year 8,000 B.C.E. in Mesopotamia. There the plants grew along with food so humans could eat them. These first parts of farming faced many challenges with insects and pests eating away their crops. During the era of 1000 B.C.E. the Chinese began experimenting with elements such as mercury and other compounds to contain the insects. Other civilizations would use chemicals to contain pests. The usage of chemicals has occupied agriculture, and even more recently in the 1940’s inorganic substances composed of various elements were heavily used to contain the insects affecting the crops. The growth of many synthetic pesticides occurred during this time, the most common one was DDT. DDT was used the most…

    • 171 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    Have you ever heard of the Black-Footed Ferret? You probably haven’t because they are becoming extinct! To begin, elements that are killing these animals include death by car, trapping, predatory animals and malnutrition. Next, in 1973 the government put the Black-Footed Ferret on the endangered list, and is currently still considered endangered today. Nevertheless, Defenders of Wildlife is an organization that's trying to assist with restoring the ferret to its original numbers and reintroducing them brand-new areas. However, Defenders of Wildlife also must try to save the prairie dogs as well since they are ninety percent of the Black-Footed Ferrets diet. So to recap, we need to breed the ferret, be more mindful on the roads, and stop killing…

    • 141 Words
    • 1 Page
    Good Essays
  • Good Essays

    After the U.S. Fish and Wildlife Service failed to list the Northern Spotted Owl as an endangered species, several environmental groups petitioned for the Department of the Interior to reconsider this decision. The reasoning behind the Department of the Interior’s failure to list the NSO was that it’s listing would interfere with a lucrative logging industry that already had several future projects approved by the DOI. Environmental groups felt that he logging projects in Washington State were being prioritized over the responsibility that the U.S. Fish and Wildlife Service has to protect endangered species under the provisions of the Endangered Species Act. After a delay to respond to this matter, the U.S. Fish and Wildlife Service…

    • 430 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Dodos and Passenger Pigeons are both extinct birds that died by human hands. They are both birds that look similar, but they were two different type of birds. They lived in two different areas of the world and their habits were different. The reason why they became extinct are two different stories. There are differences between the Dodos and Passenger Pigeons such as are how they became extinct, in their body size, and where they lived.…

    • 503 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Betty Marie love her heritage because she was an Osage Indian. She learned so many stories about legends at her grandmothers feet.…

    • 304 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Betty Marie spent part of her childhood in Oklahoma. Betty found ballet which brought her out her shell. She took her first lesson at four years old. Betty from than on did ballet. After a couple years and many lessons she started to master and perform at concerts and later a local star.…

    • 274 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Imagine you’re a spotted owl mother who just hatched her 4 newborn owlet children. Obviously you’re thrilled to be starting this new chapter of your little owl life with a brand new family but you’re also shadowed with the fear of the young ones safety. The Great Horned and Barred Owl are stalking your new members for a late night snack and the opportunity to run you out of your home like the true savages they are. As their numbers in population increase, your own kind becomes more threatened. Once efforts to expand the Northern Spotted Owls habitat are increased, shared space with the Barred Owl is further limited and protection of their young is improved, then their population will soon increase. That…

    • 844 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Bald Eagle Research Paper

    • 1976 Words
    • 8 Pages

    The bald eagle (Haliaeetus leucocephalus), our national bird, is the only eagle unique to North America. The bald eagle's scientific name signifies a sea (halo) eagle (aeetos) with a white (leukos) head. At one time, the word "bald" meant "white," not hairless. Bald eagles are found over most of North America, from Alaska and Canada to northern Mexico. About half of the world's 70,000 bald eagles live in Alaska. Combined with British Columbia's population of about 20,000, the northwest coast of North America is by far their greatest stronghold for bald eagles. They flourish here in part because of the salmon. Dead…

    • 1976 Words
    • 8 Pages
    Good Essays
  • Better Essays

    Snowy Owl Research Paper

    • 1734 Words
    • 7 Pages

    A snowy owl will live out the entire course of its life in the open artic in most cases, while others will migrate out of the arctic tundra. They will hunt, eat, mate, reproduce, and die where they reside. The largest bird in the artic, by a weight of up to six pounds, the snowy owl stands roughly two feet tall (National Georaphic). The snowy owl is a fearless hunter and strong protector. The snowy owls are diurnal, hunting mainly during the day unlike most species of owls that tend to be nocturnal. They mainly live in isolated and remote regions of the greater north; this protects them from human interaction. Snowy owls are immensely protective over their home, hunting grounds, and offspring.…

    • 1734 Words
    • 7 Pages
    Better Essays
  • Satisfactory Essays

    Owl Pellet Dissection

    • 285 Words
    • 1 Page

    Owl pellets can provide evidence of the owl’s dietary habits and its role in its environment. Owl pellets have been used for scientific study of small mammals and their distribution. Since the owls are collecting, the scientist must locate the owls to obtain the pellets, and then study the skulls and bones of small prey living in an area. From these bones the prey species can be counted and identifies. These owls play in the role of limitating the population size of its prey. They prey species that is most plentiful in the area will be the species most likely to be captured and consumed by the owl.…

    • 285 Words
    • 1 Page
    Satisfactory Essays
  • Powerful Essays

    2.) Carey, Andrew. January 2004. “Squirrels Cannot Live By Truffles Alone: A Closer Look At A Northwest Keystone Complex”. Science Findings. Issue Sixty.…

    • 1762 Words
    • 8 Pages
    Powerful Essays
  • Satisfactory Essays

    Caged Bird Essay

    • 404 Words
    • 2 Pages

    Prose exposes numerous straw man arguments with To Kill a Mockingbird. Prose critiques the novel in a confident, yet slightly harsh manner. She believes that the novel could’ve been different if there was just a bit more detail. Prose interprets To Kill a Mockingbird in a way that focuses on prejudice and racism.…

    • 404 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Leonardo Sciacia’s The Day of the Owl explores the pursuit of truth by Captain Bellodi after a mysterious shooting upon a contractor, named Salvatore Colasberna, who is a member of the Santa Fara Co-Operative Building Society. Throughout this novel, the society of Sicily attempts to conceal the acts of the mafia who control Sicilian lifestyle. The Day of the Owl portrays the corrupted and fearful society, in which even local Sicilians and family members of victims do not attempt to counter the oppressive opposing force, the mafia. The term “truth” in Sicilian society is greatly corrupted, due to this fear of the mafia. The mafia was able to shape the perception of truth to the people in Sicily.…

    • 1129 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Casida , a professor of Environmental Science at the University of California in Berkeley, when observing pesticide-environment interactions reported; “A large number and great variety of pesticides… have reproductive and endocrine disrupting effects in mammals and wildlife” (Casida, 492). Many pesticides cause hormone levels within animals to become unbalanced, affecting sexual organs and reproductive systems, causing them to have unnatural issues. Such effects range from small, unnoticeable changes in the physiology and behavior of a species to destroying bird embryos to permanently altered sexual differentiation. In a recent case, bald eagles were at the top of the endangered species list. As a result of exposure to the pesticide DDT, the eggshells of the eagles became thin, causing them to break during the incubation period. DDT was banned in the late 1970’s and the bald eagle populations have been rising since (Bald Eagles, Sea to Shining Sea). As one could imagine, if DDT had not been regulated and banned in the United States, then the country would have lost its majestic national bird to pesticide poisoning. This shows that pesticides are extremely harmful to wildlife and can cause detrimental damage not only to the animal itself, but to its…

    • 436 Words
    • 2 Pages
    Good Essays