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The toad is able to absorb water from the surrounding soil; even as the soil becomes increasingly dry in spring and early summer months, increased concentrations of urea in the toad's body allow it to continue to suck water out of the soil through osmosis. When the summer rains arrive the Great Basin spadefoot emerges from its burrow. [4]
The toads are believed to have moved into North America from South American countries due to a changing climate. They most likely moved into the U.S. as a single species, but split up as they spread across the continent and adapted to their new surroundings. The toads prefer marsh-like environments, but only enter the water to breed.
The American toad (Anaxyrus americanus) [3] is a common species of toad found throughout Canada and the eastern United States. It is divided into three subspecies: the eastern American toad (A. a. americanus), the dwarf American toad (A. a. charlesmithi) and the rare Hudson Bay toad (A. a. copei).
The Illinois List of Endangered and Threatened Species is reviewed about every five years by the Illinois Endangered Species Protection Board (ESPB). [1] To date it has evaluated only plants and animals of the US state of Illinois, not fungi, algae, or other forms of life; species that occur in Illinois which are listed as endangered or threatened by the U.S. federal government under the ...
About 150,000 years ago, the area that is now known as Monroe County in southwest Illinois was covered in ice hundreds of feet thick. When the ice melted, the water flowed into fractures in the ...
The fauna of Illinois include a wide variety of mammals, birds, amphibians, reptiles, fish and insects (not listed). The state bird is the Northern cardinal . The state insect is the monarch butterfly .
The western toad (Anaxyrus boreas) is a large toad species, between 5.6 and 13 cm (2.2 and 5.1 in) long, native to western North America. [ 1 ] [ 3 ] [ 4 ] A. boreas is frequently encountered during the wet season on roads, or near water at other times.
The yellow-bellied toad has defense mechanisms such as skin-secreting toxins that decrease its appeal to predators, allowing for a longer life span. Interestingly, in the yellow-bellied toad, specific populations exhibit a wide range of life spans across the fast-slow continuum, with climate conditions accounting for a significant amount of ...