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  • No Sex Needed: All-Female Lizard Species Cross Their . . .
    Species as diverse as Komodo dragons and hammerhead sharks do it asexually if necessary, but some species, like these little lizards, don't have a choice "They can't exchange genetic material
  • Horses in North America: A Comeback Story - PBS
    Ancient horses roamed the North American continent for millions of years And many, many years later, horses played an integral role in building the foundation of the United States
  • Tamarix spp. - US Forest Service
    Taylor and McDaniel present integrated management approaches including combinations of herbicide, burning, mechanical control treatment, and revegetation with native species and report success in controlling saltcedar and improving habitat for several species of birds, small mammals, reptiles, and amphibians in the Bosque del Apache National
  • Evidence of Common Ancestry and Diversity
    The first mammals evolved on Earth during the early Jurassic period approximately 200 to 175 million years ago These early mammals evolved from a common ancestor they shared with reptiles (Fig 5 22A) Early mammals, like their reptile ancestors, were tetrapods and amniotes (Fig 6 4)
  • The evolution of reproductive modes and life cycles in amphibians
    Surprisingly, the majority of sampled amphibians lay eggs on land, not water (Anura = 51 5% of n = 7097 sampled species in total; Caudata = 61 1% of n = 738 species; Gymnophiona = 67 5% of n = 212 species; Fig 1) In anurans, biphasic fully aquatic reproduction (eggs and larvae develop in water) was the most common mode, present in 43 8% of
  • Tiger | Species | WWF - World Wildlife Fund
    Juvenile mortality is high, however—about half of all cubs do not survive more than two years Tigers have been known to reach up to 20 years of age in the wild Males of the larger subspecies, the continental tiger, may weigh up to 660 pounds For males of the smaller subspecies—the Sunda tiger—the upper range is at around 310 pounds
  • Cute, colourful, tiny – and weird – they can beat their wings . . .
    Learn how fast a hummingbird's wings beat and where to see in the wild in BBC Wildlife expert hummingbird guide





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