I've been feeding both wingless melo's and vestigial winged melo's to my frogs recently. Because I keep a nice sized chunk of banana in each viv, the flies are usually able to reproduce in the viv to a small extent. I recently got my first hatching of these flies and you know what... they are fliers. Now when I open my vivs I have to deal with a ton of flying fruit flies. The frogs sure do love jumping after these guys but it's annoying me. So here's your warning... don't do this!