Not another Facebook group buried in a feed algorithm. Duck Friends is a proper forum, a directory of vets who actually see ducks, and a bulletin board for sitters — organized, searchable, and here tomorrow.
Free to join · Organized by topic, not an algorithm

Threaded, searchable, and it sticks around. Ask once and the answer is still there for the next person.
Most small-animal clinics won't see ducks at all. Each listing says whether the clinic is confirmed to treat pet waterfowl — and clinics can claim and correct their own details.
Post a card, answer a card. Free classifieds, no fees, no cut — you arrange the rest between yourselves.
Abandoned Easter ducklings, park dumps, injured wild birds. This directory is free for rescues to be listed in, and always will be.
Joining is free. Read the forum without an account, or sign up to post, save vets, and get replies.