Polyphemus Silkmoth
Antheraea polyphemus
One of the two giant silkmoths we get here on the island, the other one is the Ceanothus Silkmoth.
Just released this male and another one. Raised them last summer and it's there time to emerge.
To attract them put out a black light for the night, they will be flying over the next couple of weeks. They like to fly a couple of hours before sunrise. They don't always hang around the light, they will fly in then out again a few times during the night, sometimes you will find them roosting close by in the morning so you have to look around. First time I seen one I thought it was a bat, that's how big they are.