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Neither. Not all animals need to be migratory or hibernating.
they need to build their housed .
African Dwarf Frogs need to be fed bloodworms, or brineshrimp once every few days.
Frogs will eat anything that fits in their mouth, they can be fed with small slugs, worms, crickets, flies and other invertabrates.
The animal is responding to its environment.
Not unless you're talking about some species of sharks. Mammal babies have umbilical cords, and are fed all they need through that, through their mother's blood stream.
Frogs absorb approximately 20-25% of their oxygen requirement through their skin, which helps supplement their breathing through their lungs. This ability is particularly important when frogs are submerged in water or hibernating.
No, but they eat alot before hibernating
Aquatic frogs such as the leopard frog(Rana pipiens) and American bullfrog (Rana catesbeiana) typically hibernate underwater. A common misconception is that they spend the winter the way aquatic turtles do, dug into the mud at the bottom of a pond or stream. In fact, hibernating frogs would suffocate if they dug into the mud for an extended period of time. A hibernating turtle's metabolism slows down so drastically that it can get by on the mud's meager oxygen supply. Hibernating aquatic frogs, however, must be near oxygen-rich water and spend a good portion of the winter just lying on top of the mud or only partially buried. They may even slowly swim around from time to time.
Frogs need insects to eat and plants to hide among.
That is the correct spelling of "hibernating" (seasonal inactivity).