Sorry it took so long to finish on how to make Hawkgirl.
The helmet is made out of duck tape and tin foil.
First you use the tin foil to shape your head. Then you put duck tape on it. When you are done with that, you get paper and make the helmet wing thing. Then duck tape the wings to the helmet. I used black and yellow duck tape.
I will be posting a video soon. I hope I can find the pics of all the stuff, and I hope that it will help you.
If you can't figure it out let me know. If you have any question ask them.