How do animals  know how cold it is going to be in the winter?
829361
They can't know, just like we can't.  \n\nThey may be able to read cues and clues like we do, but they are not prognosticators.  \n\nGenerally plants and animals are adapted to the area they live in, and know how to prepare either from experience or even genetic cues.  Also, they always seem to prepare for the worst.  I've seen trees in warm California lose there leaves because they thought winter was coming.  It was, but they could have easily grown through the mild winter.  They were a species adapted to a different climate.\n\nGood question.  It shows you're thinking about your world!
832217
Most animals shed or grow fur/feathers in order to adapt to different temperatures.
430850
Absolutely not.  They are warm-blooded creatures capable of maintaining an internal body temperature.  If birds were cold-blooded, you can bet that penguins and non-migratory birds would be in deep trouble when exposed to low temperatures!
667453
i dunno but it'll be cold
1014160
maybe it senses the temp?-just a guess
504348
It depends.. iF htey live there all year round they have layers fo fat called blubber\nthey also have fur... polar bears have clear fur to collect heat and light and warm the bears. \n\nif they are travelling inbetween cold and warm( like humans d0)\nthey do things like shiverring and teeth chattering, also the blood rusehs to the skin to warm and away from the ears adn the feet to keep the inner organs warm
59318
Many bears of northern regions are assumed to hibernate in the winter. In fact, they don't hibernate. Their body temperature sinks a moderate amount and they can be easily awakened.
597128
See if there's a difference in their rate of movement in cold, normal and hot conditions.
108061
Because fishes are cold blooded animals....sweating is a way for regulating temperature that is often employed by mammals.
200818
Do you live in a really cold climate?
637626
There are a few species of fleas hardy enough to survive in northern climes, but even they are only able to thrive during the summer months.  During the winter they are not a problem, spending the months in diapause.\n\nDuring the summer, it is quite possible for a polar bear to get fleas, especially if they are living towards the southern end of their range where they are coming into contact with critters like red fox, wolves and dogs.  \n\nIt's unlikely that they would get a huge infestation of fleas though, and the fleas would not be likely to survive the winter.
959761
Yes, it does.\n\nIt is meant to be a thermometer.\n\nWhen its cold it becomes hard and pointy.
148293
If they're acting weird in your locale, better check the weather reports.  Animals are highly sensitive to climatic changes, and electro-magnetic disturbances.
443316
Horses have hair.  Depending on the climate, an Arabian horse will grow a substantial winter coat.\n\nIf you compare an Arabian living in California, with one living in Montana, you can visibly see the difference in their winter coats.
223973
They are less active in winter but they don't migrate. It was just looking for a place to rest for a minute that offered a little shelter from the weather.
984363
Animals sense things alot better than humans do.
172797
there is ice when it is cold, this is known as being frozen