BIRD QUIZ: Here is a bird singing in Ontario in late July. Do you know what species it is? Leave your answer in Comments and we'll post ours at the end of the day. Thanks to Peter Hawrylyshyn for sharing this video with eBird and the Macaulay Library archive. [Video description: A singing bird perched on a thin horizontal branch. The bird is brown above and white below, with dark spots on the breast. Text on video: Mystery Bird, Avis ignota, © Peter Hawrylyshyn / Macaulay Library, Cornell Lab.]