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The American bullfrog is the largest of the "true frogs" family.
The American bullfrog is also used as a specimen for dissection in many schools across the world.
A couple invasive species include the American bullfrog and certain grasses used for cattle.
The brown frog, leopard frog, and the American bullfrog are also included.
The North American bullfrog demonstrates three of them.
The main cause of the population decline is habitat loss and destruction, but introduced predatory species, such as American bullfrogs, might also be a factor.
In addition to habitat loss and fragmentation, introduced predators such as the American bullfrog may also be suppressing recovery.
All but three of the down-home American bullfrogs leapt further, creating waves of excitement.
The American bullfrog (Rana catesbeiana) is its common name.
The American bullfrog is also known as Lithobates catesbeianus.
The American bullfrog's genus name comes from the Latin word rana, which means frog.
"American Bullfrog"
It also occurs in other amphibians that develop in crowded temporary ponds, for example the South American bullfrog.
American bullfrog (not established)
A 2006 study concluded that low doses of triclosan act as an endocrine disruptor in the North American bullfrog.
The American bullfrog provides a food source, especially in the Southern and some areas of the Midwestern United States.
The earliest documented case of the disease chytridiomycosis was an American bullfrog (Rana catesbeiana) collected in 1978.
The croak of the American bullfrog (Rana catesbiana) is sometimes written as "jug o' rum".
Even though it shows no symptoms of fungal infection, the North American bullfrog, Rana catesbeiana, is a carrier.
"These're American bullfrogs," Pup said.
Leopard frogs (meadow frogs) were often grouped with the American bullfrog and relatives in the genus Lithobates.
MALE American bullfrogs have eardrums that are twice as large as females', but that is not because they listen harder.
The annual global trade in the American bullfrog (Rana catesbeiana), mostly farmed in China, varies between 1200 and 2400 tonnes.
Dozens of species of frogs and amphibians are common throughout the river system including the American Bullfrog and the Eastern Newt.
The American Bullfrog (Rana catesbeiana or Lithobates catesbeianus) is a semi-aquatic frog.
The American Bullfrog (Rana catesbeiana or Lithobates catesbeianus) is a semi-aquatic frog.
Although some authorities accept the specific name Rana catesbeiana, others consider this frog should be included in the genus Lithobates as Lithobates catesbeianus.
The exact process through which the fungus was introduced to Asia is not known, however, as mentioned above, it has been suggested transportation of asymptomatic carriers species (e.g. Lithobates catesbeianus, the American Bullfrog) may be a key component in the dissemination of the fungus, at least in China.