Insect and Spider Identification: Flealike insect with wings?, 2 by Heijiyo

Heijiyo wrote:
Hi everyone,
after finding some bug bites on my body, I installed a bug trap in my bedroom and the insect that landed in there is the one that you can find in the pictures. I'm not really sure if I have already found the culprit or whether this is just a random insect that found its way in there. Can someone help me to identify this insect?
If it hadn't been for the wings I would have guessed that it is some kind of flea.

If it is any help, I live in Hamburg (Germany).

Thank you in advance for the help.