Not a plant, but can anyone identify???

I have pictures of two moths that appeared one morning this summer. They were huge, about 7 inch wing span. I just thought there might be someone here who could tell me what they are (even though they're not plants). One was patterned in orange, gray, brown and black, the other was a pale yellow with gray stripes and bright blue and yellow "eye" patterns on the lower wings. I've never seen anything like it. Ideas anyone?

 

Hummingbird moth perhaps?

 

Go to BugGuide and look up Sphingidae and Saturniidae in the section on Moths and Butterflies.

 

Thanks. I found them there. One was a polyphemus moth, the other a cecropia moth.