×2You’ll need to give it warmth like around 85 for now. And if your planning on keeping it know this it’s illegal to take wild waterfowl out of the wild and even though you found it in a parking lot it still is a wild duckling. It will need chick starter for feed and room temp water to drink in something it can’t climb into a drown a stuffed animal to cuddle with. Heat lamp or heating pad on low setting with towel wrapped around it ca work for heat just don’t cook the little one
When you go look for feed try to get something formulated for ducks if you can like Purina flock raiser or Nutrena naturewise meat bird feed. If you can't find something specifically for ducks the chick starter is ok but it doesn't have enough niacin for what ducks need so you will need to add brewers yeast or supplement it somehow with some vitamin b complex.