JuliaRose, if u happen to look carefully, the birds are coming from Iran (the North Side) where the weather is more cold are going South to warmer / Tropical Climates.
There are two types of Migration:
long-distance migration, &
short-distance migration.
As per my knowledge, some short-distance migrating birds stay in warmer regions of Saudi Arabia along the red sea coast; whereas some more species travel to Egypt, Sudan and farther to Ethiopia.
For long-distance migration, birds fly as far as South Africa too.
More information can be found on WIKIPEDIA.