Veterinary questions? Ask a Vet for Answers ASAP
Good morning, I am Laura, on of the UK vets.
If it is injured it will need to be brought in for treatment. If it is releasable, it will be released where you found it so should be able to meet up with its mate.
Do you have a blanket of a coat you could throw over the injured duck? That's the easiest way to grab them. You can then keep it wrapped until you get to the vet, or transfer it to a box.
It's mate might be protective but the most it can do is nip at your fingers or face, if you stand your ground.
Brilliant, thank you for taking care of our wildlife.
Haha, the best kind of rescue! Laura