Kip Evans Photography

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  • This mature tadpole is a member of the mountain yellow-legged frog complex which is comprised of two species: Rana muscosa and Rana sierrae. Both species are highly aquatic and are always found within a meter or two from the edge of water. Rana sierrae is yellowish or reddish brown from above, with black or brown spots or lichen-like markings. Toe tips are usually dusky. Underside of hind legs and sometimes entire belly is yellow or slightly orange, usually more opaque than in foothill yellow-legged frog, (Rana boylii). Yellow often extends forward to level of forelimbs. Dorsolateral folds present but frequently indistinct. The tadpoles are black or dark brown and are large (total length often exceeds 10 cm) and metamorphose in 1-4 years depending on the elevation. Rana sierrae differs from Rana muscosa in having relatively shorter legs. Rana sierrae have declined dramatically despite the fact that most of the habitat is protected in National Parks and National Forest lands. A study that compares recent surveys (1995-2005) to historical localities (1899-1994; specimens from the Museum of Vertebrate Zoology and the California Academy of Sciences) found that 92.5% of populations have gone extinct (11 remaining out of 146 sites; Vredenburg, et al., 2007) (Vance Vredenburg (vancev AT berkeley.edu),
    Sierra Nevada Yellow-legged Tadpole-...jpg
  • A closeup view of a rare Ridley Sea Turtle at the Cocos Island off the coast of Costa Rica.
    Olive Ridley_ (c)KipEvansMG_1851.jpg
  • A red eyed tree frog in a Costa Rica rainforest.
    RedEyeTreeFrog_MG_5998.jpg
  • Costa Rica Frog
    Costa Rica Frog 2_MG_2998.jpg
  • A split water view of a rare Ridley Sea Turtle at the Cocos Island off the coast of Costa Rica.
    Turtle Split Shot_(c)KipEvansMG_1840.jpg
  • Costa Rica frog
    Costa Rica Frog_MG_2985.jpg
  • A tree frog rests on a leaf in Costa Rica.
    tree frog_MG_5990.jpg
  • A green and black poison dart frog (Dendrobates auratus) in Costa Rica.
    green black poison dart frog_MG_5994.jpg
  • A split-water view of a rare Ridley Sea Turtle at the Cocos Island off the coast of Costa Rica.
    Ridley Sea Turtle_MG_1834.jpg
  • A helmeted basilik lizard (Corytophanes cristatus) in Costa Rica.
    helmeted basilik lizard_MG_3120.jpg
  • An anole lizard rests on a palm branch in Costa Rica.
    anole lizard_MG_3294.jpg
  • A red-eyed tree frog (Agalychnis callidryas) rests on a leaf in Costa Rica.
    red eyed tree frog_MG_5999.jpg
  • Mojave Fringe-Toed Lizard
    Mohave Fringe-toed Lizard_O2R5436.jpg
  • Green Sea Turtle (Chelonia mydas), Ohau Hawaii
    Green Sea Turtle-Kip-1445.jpg
  • The California Slender Salamander occur throughout the California coast ranges, in the Sierran foothills, and in the transverse ranges of southern California.
    California Slender Salamander.jpg
  • Green Basilisk (Basiliscus plumifrons) lizard in Costa Rica.
    Costa Rica Lizard_MG_2937.jpg
  • California Slender Salamander
    California Slender Salamander_LM4C42...jpg
  • Mountain Yellow-Legged Frog, Sierra Nevada. CA
    Mountain yellow-legged frog-Kip-2353.jpg
  • California Red-Legged Frog, Pinnacle National Monument, CA.
    CA Red-Legged Frog-Kip-1824.jpg