Map showing the highest Great Horned Owl breeding evidence per square. Grey squares have no Great Horned Owl breeding evidence and are a good target for late-season Atlassing. Click a square to show the current breeding evidence.
Here’s a video that shows how to find missing species in more detail: https://youtu.be/zhxXFucOcXM?si=BwMlvxgO3RPV_vbK