Search results
Results from the WOW.Com Content Network
The water-holding frog has an aestivation cycle. It buries itself in sandy ground in a secreted, water-tight mucus cocoon during periods of hot, dry weather. Australian Aboriginals discovered a means to take advantage of this by digging up one of these frogs and squeezing it, causing the frog to empty its bladder. This dilute urine—up to half ...
During aestivation water holding frogs shed several layers of their skin and secrete a water-tight mucus cocoon that is used to line their burrow in order to retain and maintain water more effectively. [5] They also tend to ingest this lining for additional nutrition when required. [9]
These glands secrete mucus and a range of toxins that make frogs slippery to hold and distasteful or poisonous. If the noxious effect is immediate, the predator may cease its action and the frog may escape. If the effect develops more slowly, the predator may learn to avoid that species in future. [186]
Cuban tree frogs are the largest tree frogs in North America, ranging from 2 to 5.5 inches or (5 to 12.7 cm) in length. [8] Cuban tree frogs are mostly gray, brown, or green, with young frogs having more green coloration than adults. These frogs have rough, warty skin with blotchy or mottled patterning. [9]
The nest's protective quality may be further enhanced when the outer mucus dries to form a hard outer cast, effectively reducing water loss by reflecting solar radiation and trapping moisture. Fletcher's frog eggs can survive and even continue developing for several days in the absence of free-standing water.
When met with a dry period, these frogs tuck their ventral areas under them so that only their resistant skin is exposed. They also secrete a water-resistant mucus to seal any small gaps when they aestivate. [12] [13] If disturbed and forced to move, they lose a significant amount of water and may not be able to survive the rest of the dry ...
During the 19th century, several experiments were performed to observe the reaction of frogs to slowly heated water. In 1869, while doing experiments searching for the location of the soul , German physiologist Friedrich Goltz demonstrated that a frog that has had its brain removed will remain in slowly heated water, but an intact frog ...
Adult frogs try to escape by splashing and leaping into deep water. A trapped individual may squawk or emit a piercing scream, which may surprise the attacker sufficiently for the frog to escape. An attack on one bullfrog is likely to alert others in the vicinity to danger and they will all retreat into the safety of deeper water.