This is the section most likely to actually matter on your trip, because on an island this wild it happens.
Call first. The hospital takes admissions seven days a week during daylight hours and the staff will tell you whether to intervene at all. Half the nestlings people rescue did not need rescuing.
Do not feed it. Not water, not bread, not anything. A dehydrated or shocked animal can be killed by the wrong food or by aspirating water, and well-meant feeding is a common cause of death in animals that would otherwise have recovered.
Contain it safely if told to: a ventilated box lined with a towel, somewhere dark and quiet, away from pets and noise. Darkness reduces stress more than anything else you can do.
Do not handle a large wading bird, a raptor, an alligator or anything with a serious beak or claws. Herons strike at eyes. Wait for advice.
Fishing line is the local epidemic. Monofilament discarded at the causeway, the passes and the fishing piers entangles pelicans, cormorants and ospreys constantly, and it is the single most avoidable category of injury that arrives here. Take your line home. Cut it short if you see it on the ground. Use the monofilament bins where they exist.
Road strikes on gopher tortoises and snakes are the other big one. The island's speed limits are low for a reason.