That depends on two things.
Firstly, which birds? There are thousands of species.
Secondly, south of where? The south of Earth is a monumentally massive place, both in longitude and latitude.
Re-ask the question with the missing details.
They don't stay when it is snowing. Hasn't anybody learned that birds fly south in the winter?
The main reason that birds fly south in the winter is because they can't stay in a cold place so they fly south to a warmer place during the winter.
Birds survive in the winter by migrating south for the winter to stay warm when spring comes around they migrate back.
Monarch Butterflies. They fly south for the winter like birds do.
Birds fly on rainy days because when they do there moving south to go to another place so they can stay warm and not cold.This is why birds fly on rainy days sorry if it's wrong but this is what I think about it and then they come back to see if it's good enough for them to stay if not then they come back and stay it is like a rotation.Again I'm sorry if it's wrong but this is what I think about birds flying in rain:p :)
South American rhea, Australian emu, and the African ostrich.
There are several different parking options at Gatwick Airport. Some of the parking options at Gatwick Airport include Long Stay South, Long Stay North, Short Stay South, and Short Stay North.
It is dangerous to drive while under the influence. In SC, a DUI will stay on a persons record for the rest of their life.
Our South African Birds was created in 1941.
Birds Fly South was created in 2001.
When the Birds Fly South was created in 1945.
There are 1000 species of birds in South Africa