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Up to two-thirds of the frog’s body can be frozen but it will still survive. With the arrival of the spring thaw, water re-enters the frog’s cells and their heart starts beating again.
Moor frogs from European Russia and Western Siberia are able to tolerate freezing to temperatures as low as -16 °C. Moor frogs from Denmark are only able to survive freezing temperatures as low as -4 °C for 3 to 4 days. The minimum freezing temperatures at which frogs are able to survive with 0% mortality is different between frog populations.
Wood frogs range from 51 to 70 mm (2.0 to 2.8 in) in length. Females are larger than males. [5] [6] Adult wood frogs are usually brown, tan, or rust-colored, and usually have a dark eye mask. [7] Individual frogs are capable of varying their color; Conant (1958) depicts one individual which was light brown and dark brown at different times.
The spring peeper (Pseudacris crucifer) [3] is a small chorus frog widespread throughout the eastern United States and Canada. [4] It prefers permanent ponds due to its advantage in avoiding predation; however, it is very adaptable with respect to the habitat it can live in.
Hyla japonica, commonly known as the Japanese tree frog, is a species of anuran native to Japan, China, and Korea. H. japonica is unique in its ability to withstand extreme cold, with some individuals showing cold resistance at temperatures as low as −30 °C for up to 120 days. [2]
Ceratophrys is a genus of frogs in the family Ceratophryidae. They are also known as South American horned frogs as well as Pacman frogs due to their characteristic round shape, horned brows, and large mouth, reminiscent of the video game character Pac-Man.
It can survive in water for an extended amount of time, as well as attach to feathers. [9] These facts, on top of the fact that Bd can also infect salamanders and frogs in all stages of life result in the pathogen persisting in an environment long enough to continually infect new frogs (9,11). [ 10 ]
Male Rana temporaria calling in a garden pond in Jambes, Belgium. The common frog or grass frog (Rana temporaria), also known as the European common frog, European common brown frog, European grass frog, European Holarctic true frog, European pond frog or European brown frog, is a semi-aquatic amphibian of the family Ranidae, found throughout much of Europe as far north as Scandinavia and as ...