If some birds find it too cold, they will go and stay in their nests to keep warm.
Some birds fly to other countries where it's warm. Other stay where they are.
birds migrate during the winter because since us humans also cant stand the cold temperature we buy gloves, hats ect.. that's not what birds do in order to get warm. birds migrate mostly in the winter time because some other animals hibernate in the winter so there's no food left .the migrate to get food in order to live and stay until its winter were they are.-information from *Amaz!nqq Shorty*
Many do migrate, but some do not. Some can adapt to winter cold and do quite well.
because it is cold
my guess is coz some birds can tolerate cold weather while others can't
They migrate to warmer places in the winter because it is too cold for them to live in certain areas
Blue jays are mostly non migratory..Some Northern birds may withdraw southward in winter.
it was cold there
Migration of the birds occurs during autumn. The birds fly south prior to winter.
For some reason
In the US, animals like squirrels, rabbits, deer, and birds have adaptations to survive the winter. They may grow thicker fur or feathers, store food for winter months, change their diet, or go into hibernation to conserve energy during the cold season. Some animals migrate to warmer areas during winter to avoid harsh conditions.
During the winter (and all year in Antarctica the worlds largest desert) it can get extremely cold and some of snow falls. During the summer (but not Antarctica) it can get hot during the days.
Some birds can't stand the cold temperatures that winter can bring, so flying south to warmer climates is there natural survival instinct. To answer your question yes south is a good place