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A tadpole or polliwog (also spelled pollywog) is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles have some fish-like features that may not be found in adult amphibians such as a lateral line, gills and swimming tails.
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]
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The tadpoles at first look similar to those of the common frog (Rana temporaria) but they are a darker colour, being blackish above and dark grey below. They can be distinguished from the tadpoles of other species by the fact that the mouth is the same width as the space between the eyes, and this is twice as large as the distance between the ...
A magical underwater image of western toad tadpoles has won the 2024 Wildlife Photographer of the Year competition.
These tree frogs can vary in size from 2 to 5.5 inches (5 to 12.7 cm) in length. Due to their large size, Cuban tree frogs can eat a wide variety of things, particularly native tree frogs, and their removal has shown to result in an increase in the amount of native tree frogs in an area. [ 6 ]
Researchers have found that negative effects of low temperatures and high ultraviolet-B (UVB) radiation on tadpole survival are greater when the two stressors are combined. [5] UVB radiation decreased the survival of striped marsh frog tadpoles, but there was an increasingly large mortality rate when low temperatures were involved. [ 5 ]
Pseudis paradoxa, known as the paradoxical frog or shrinking frog, is a species of hylid frog from South America. [2] Its name refers to the very large—up to 27 cm (11 in) long—tadpole (the world's longest), which in turn "shrinks" during metamorphosis into an ordinary-sized frog, only about a quarter or third of its former length.