- Crows Are So Smart They Can Identify Geometric Shapes, Study Finds ScienceAlert
- Crows May Grasp Basic Geometry: Study Finds the Brainy Birds Can Tell the Difference Between Shapes Smithsonian Magazine
- Crows understand shapes and use geometry in everyday life Earth.com
- Crows can recognize geometric regularity Phys.org
- Crows are nature’s mathematical geniuses and sneaky scavengers Green Prophet