I came across these two moths in my dogwood bush tonight (in Peterborough suburbs). Some Internet searches helped me identify them as Cecropia moths. They are quite large and were motionless for a long time…I’m no expert but I believe they were mating. Closer inspection of my dogwood bush shows there is another unopened Cecropia cocoon in its branches.
Observer: Ruthanne Sobiera, Glenforest Crescent