Keep an eye on ornamental geraniums in Ontario!
I just took another look at this four-year-old observation of leaf mines on Dusky Crane's-Bill (*Geranium phaeum*) in Toronto: https://www.inaturalist.org/observations/87079513 The mines are a good match for the *Agromyza nigrescens* mines shown on the European leafminer site: https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/diptera/brachycera/agromyzidae/agromyzinae/agromyza/agromyza-nigrescens/ I haven't come across any similar observations since then, but please keep an eye out, and if you see any, collect the leaves for rearing. This would be a new species for North America.
