Hi, The attached picture of two leaves have very unusual markings. They were found on a play ground. I am curious if they were created by an insect.
Thank you for contacting the Toronto Master Gardeners. I highly doubt that the markings on those leaves were made by insects. In general, insects have mouth parts adapted for either chewing or piercing (usually followed by sucking eg plant juices). The markings in your photo do not look like the result of either of these.
July 25, 2021