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 the 1930s, farmers from the Midwestern Dust Bowl states, especially Oklahoma and Arkansas, began to move to California; 250,000 arrived by 1940, including a third who moved into the San Joaquin Valley, which had a 1930 population of 540,000. During the 1930s, some 2.5 million people left the Plains states. The Modesto Bee on September 30, 2008 reviewed Dust Bowl migration to California. A series of wet years in the 1920s led farmers to believe that the Plains could sustain annual plowing to produce wheat.