A temperature under the freezing point.
A teperature under 0 oC.
Under ideal conditions, population increases.
They have lots of blubber to protect them self from the freezing conditions
Just below freezing is ideal
It needs conditions of sunny but freezing
no
no
remember that the posted speeds are intended only for the most ideal conditions
yes it is!!
yes
ground temperature below freezing, and air temperature slightly above freezing.
Ideal Conditions