Red Admiral

Thanks @catgrin. Very helpful. This beautiful Red admiral butterfly on the picture from a unidentified visitor became something like a pet to me. I tried to keep it in my room (because if I let it outside it will freeze) and I succeeded. There has been a week since I found the butterfly and it's still alive. Also I think that I succeed to feed her with fruits and sugary water :) I noticed the knobs but I didn't know that only butterflies have it :) Thanks for the useful info. Regards

Thank you for the ID. I appreciate it.