Hello,

You found a wonderful Luna moth (Actias luna). So this is not mouths but moons on the wings

The male doesn't feed and stays alive for around a week only (time to find a female!).

You can compare it with the one I photographed last year on my website (click on "Papillon lune".

http://parcours.pilonm.org/insectes/saturniidae.htm

Cheers,

Michel
-----
Michel Pilon
Naturalist-photographer
Quebec, Canada

Mes Parcours Nature
parcours.pilonm.org