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The Houston toad (Anaxyrus houstonensis), [4] formerly Bufo houstonensis, is an endangered species of amphibian that is endemic to Texas in the United States. [5][6] This toad was discovered in the late 1940s and named in 1953. It was among the first amphibians added to the United States List of Endangered Native Fish and Wildlife [3] and is ...
Decline in amphibian populations. The golden toad of Monteverde, Costa Rica, was among the first casualties of amphibian declines. Formerly abundant, it was last seen in 1989. Since the 1980s, decreases in amphibian populations, including population decline and localized mass extinctions, have been observed in locations all over the world.
This only happened in fish-free lakes, because only those had enough frogs and enough genetic variation to evolve resistance. So in 2006 Knapp and other researchers set about to see if the frog ...
List of amphibians of Texas. Seventy-two amphibian species are found in the American state of Texas, including forty-four species of frog and twenty-eight species of salamander. Four species are categorized as endangered by the International Union for Conservation of Nature: the Barton Springs salamander, the Texas blind salamander, the black ...
Aug. 28—For the fourth time, hundreds of endangered frogs were released into the Columbia National Wildlife Refuge with the intent to revitalize their population. The nearly 400 northern leopard ...
The Texas toad is native to the United States where it is found in the state of Texas, wherein 2009 it was designated as the Texas State Amphibian, [4] its range also extends northward to Oklahoma, westward to New Mexico and southward to northern Mexico. It is a desert species and is found in dry grassland, savannahs with scattered mesquite and ...
Elsewhere, habitat loss is a significant cause of frog population decline, as are pollutants, climate change, increased UVB radiation, and the introduction of non-native predators and competitors. [204] A Canadian study conducted in 2006 suggested heavy traffic in their environment was a larger threat to frog populations than was habitat loss ...
Squirrel tree frog. The squirrel tree frog (Dryophytes squirellus) is a small species of tree frog found in the southeastern United States, from Texas to Virginia. This is an introduced species in the Bahamas. Squirrel tree frogs are small frogs, about 1.5 inches in length as adults. There are several color variations, but most commonly they ...