While I do volunteer in the field of wildlife rescue I’m also pretty sure this is an AI generated image.

However from what I can make out I do have some possible explanations:

A knife: Useful for things like cutting netting or fishing line or anything else an animal may get tangled up in.

A syringe: we don’t really use those ourselves as we aren’t vets, but some of our animals require antibiotics fast (within 2 hours of injury). Also euthanasia is usually done using a syringe.

Trash: the rest looks like the kind of trash one may find stuck to an animal, lodged in its throat, etc. Or it could just be litter that one would pick up to keep the wildlife area clean.