In very hot weather the Galahs will minimally spread their wings as a cooling mechanism.
Galahs do not have sweat glands and the area under their wings has less feather coverage and contains major blood vessels. By holding their wings slightly away from their bodies, the Galah - and birds in general - expose this area to the air, allowing heat to escape and cool the blood circulating near the skin.
Spreading their wings along with rapid, open-beak breathing increases airflow and facilitates the evaporation of moisture from their respiratory systems, further cooling them down.
