Zebra finches are one of the most studied birds in the world. By 2010 there were over 1,500 published scientific papers using zebra finches as a subject.
They nest at any time during the year, usually after heavy rainfall. They build a nest in bushes, grass, caves, tree hollows, or on artificial surfaces like buildings and towers. Zebra finch chicks have pearlescent lining on the corners of their mouths to guide parents in feeding them in lower-light nests.
Zebra finches eat seeds, and their beaks are shaped to remove indigestible husks from the nutritious seed germ.