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  • How new bird species arise - ScienceDaily
    Researchers have provided evidence that birds in mountainous areas -- where the vast majority of the planet's species live -- have left lowland habitats for higher and higher mountain elevations
  • Birds of New York | Audubon
    When we say that birds are an "indicator" species, it means their presence—or absence—tells us about the health of an ecosystem Audubon worked with a couple who own and manage 117 acres of forest Their woodlands have a wonderful variety of mature tree species – maples, beech, birches, eastern hemlock, oaks, and some large shagbark hickory
  • BIO Exam 4 Flashcards - Quizlet
    Study with Quizlet and memorize flashcards containing terms like A fungus and an algae grow together to produce what we call a lichen When investigators separate out the fungus from the alga and try to grow them in the same habitat but each alone, they all die What hypothesis most logically explains this phenomenon?, Polar Bears live on the Arctic ice and are huge They are fierce predators
  • Species and Speciation - Stanford University
    Geographic variation -- birds showing different characteristics in different areas -- is inevitable among the populations of all species with extensive breeding distributions It is largely the result of populations responding to different pressures of natural selection in different habitats
  • The Basics of Bird Migration: How, Why, and Where
    Canada Geese by Brad Imhoff Macaulay Library Originally published January 2007; updated August 2021 Geese winging their way south in wrinkled V-shaped flocks is perhaps the classic picture of migration—the annual, large-scale movement of birds between their breeding (summer) homes and their nonbreeding (winter) grounds
  • The Top 5 Threats to Bird Populations - Science of Birds
    Some species migrate farther from the equator in summer, while others move to higher elevations in the mountains And the timing of migration has shifted for some species Not all of these changes are necessarily bad for all birds Some species’ populations are actually increasing because of global warming But these species are in the minority





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