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  • Hawk - Wikipedia
    Unlike some birds, but similar to other diurnal raptors, most hawk species are violet-sensitive but cannot perceive ultraviolet light [11] Hawks also have relatively high visual acuity – the distance at which they can resolve an image – with red-tailed hawks reported to have 16 8 cycles per degree [ 12 ]
  • Human impacts on the rates of recent, present, and future . . .
    Bird species have highly skewed geographical range sizes; a few, familiar species have almost continent-sized ranges, but a quarter of the world’s birds have ranges <50,000 km 2 Such range-restricted species are overwhelmingly the most threatened species (35% threatened compared to 4% of larger-ranging species) and they are geographically
  • List of oldest trees - Wikipedia
    There are three tables of trees, which are listed by age and species The first table includes trees for which a minimum age has been directly determined, either through counting or cross-referencing tree rings or through radiocarbon dating Many of these trees may be even older than their listed ages, but the oldest wood in the tree has rotted
  • Bat - Wikipedia
    The second largest order of mammals after rodents, bats comprise about 20% of all classified mammal species worldwide, with over 1,400 species These were traditionally divided into two suborders: the largely fruit-eating megabats , and the echolocating microbats
  • National Audubon Society
    The National Audubon Society protects birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground conservation
  • CHAPTER 7 STUDY GUIDE RADIATE A 7. 1 Introduction A. A . . .
    1 Over 9,000 species are in the phylum Cnidaria 2 Cnidaria have specialized cells (cnidocytes) that contain a specialized stinging organelle, the nematocyst 3 Nematocysts are only formed and used only by Cnidarians 4 Cnidarians originated close to the base of the metazoan lineage 5 Fossil cnidarian specimens are dated to over 700
  • Woodpecker - Wikipedia
    Members of this family are found worldwide, except for Australia, New Guinea, New Zealand, Madagascar and the extreme polar regions Most species live in forests or woodland habitats, although a few species are known that live in treeless areas, such as rocky hillsides and deserts, and the Gila woodpecker specializes in exploiting cacti





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