We rarely fish with damselfly, in Europe, but with the damsel nymph which is pretty productif, on reservoirs and lakes, especially with carp! But if you decide to go to Patagonia, you better have some damsels in your flybox! Look at those brown trout coming from the abyss to eat those birds! Tie some if you’re ever going to Northen Patagonia, like on Vintter lake or others.
https://vimeo.com/254752376