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Two more species, the boreal chorus frog and lesser siren, are considered to be of special concern, although they are not protected under the act. [3] There are no amphibians native to Michigan that are included in the federal Endangered Species Act. [4] Of the over 3400 species of frog and toad worldwide, the majority live in the tropics.
When feasible, this species utilizes caves for thermal refugia during the coldest months of the year. [8] The pickerel frog is a trogloxene species, meaning they occur in caves, but are unable to complete their life cycles there. Though they are most abundant in caves during the winter, they are active deep within caves at almost any time of year.
Amphibians and Reptiles, Michigan Department of Natural Resources Mammals , Michigan Department of Natural Resources State of Michigan - Crayfish Species Checklist , James W. Fetzner Jr., Section of Invertebrate Zoology, Carnegie Museum of Natural History, Pittsburgh, PA, 28 January 2008
The archaeobatrachians are the most primitive of frogs. These frogs have morphological characteristics which are found mostly in extinct frogs, and are absent in most of the modern frog species. Most of these characteristics are not common between all the families of Archaeobatrachia, or are not absent from all the modern species of frogs.
The world's largest frog is the goliath frog of West Africa—it can grow to 15 inches (38 centimeters) and weigh up to 7 pounds (3.2 kilograms). One of the smallest is the Cuban tree toad, which ...
The wood frog makes contact with the prey with just the tip of its tongue, much like a toad. [16] A more extensive amount of tongue surface is applied in the feeding strikes of these other frog species, with the result that usually the prey is engulfed by the fleshy tongue and considerable tongue surface contacts the surrounding substrate.
This "flash pattern" likely serves to startle a predator as the frog makes its escape. [6] The pattern and color variations of skin for this species will change depending on the environment they are found in. [7] Similar hidden bright patterns are common in various Lepidoptera, for instance moths of the genus Catocala. [8]
The American green tree frog (Dryophytes cinereus or Hyla cinerea) is a common arboreal species of New World tree frog belonging to the family Hylidae. This nocturnal insectivore is moderately sized and has a bright green to reddish-brown coloration. [ 2 ]