Like us, birds need to breathe air in and out of their lungs in  order to fulfill the cycle of bringing oxygen into the body. Air is  taken in through the mouth and nasal openings of the bird. yes Birds have a nose and a mouth just like humans and just like us they breath from there nose and possibly their beak.
It is estimated that approximately two million people became homeless because of the Dust Bowl and the damage it did to their farms. Approximately 6,500 people were killed during only one year of the Dust Bowl. They died while trying to hop on freight trains to get to other parts of the country to look for work.
In all, 400,000 people left the Great Plains, victims of the combined action of severe drought and poor soil conservation practices. To find additional documents from American Memory on this topic, use such key words as migrant workers, migrant camps, farm workers, dust bowl, and drought.