Well, the larger one at the top and smaller one near the bottom appear to be pincher bugs....is that what your looking at or am I missing the target pest?
Otherwise known as Earwigs....if they are on your chicken you have to have an infestation somewhere because they are not a parasite generally found on animals or people....think, more like sitting on grass next to an ant mound....that's what I mean by infestation somewhere and they just happen to be on your chicken
Ohh earwig no sorry you can't see the size from the photo they are only a couple of millimetres in size like lice but different they aren't as big as pincher bugs and they are on my polish chicken not duck but thanks for the reply
Ha! Yes, I caught the chicken/duck mistake and edited. I now see what you're talking about and I haven't a clue. So sorry, hope someone can help you figure this out!