Scientists have tried to find out how smart budgies are. They carried out an experiment in which the birds had to count. The scientists took a few food bowls, filled them up with food and closed them with a lid. They had painted dots on the lids. After that, they showed the budgies little wooden signs, also with dots painted on it.
When they showed the budgies a sign with four dots, the budgies had to open a food bowl with the same number of dots painted on it. This way, budgies learned to count up to six! Not many animals can do this.
Photo from the Cheyenne Mountain Zoo blog (http://cheyennemountainzooblog.blogspot.com)