We're a day past the vernal equinox, and with spring, comes more wildlife encounters.
Often, it's best just to leave the animal alone. This is especially true of young animals because while they may appear abandoned, the mother is quite frequently close by.
However, if you happen to come across an animal that is in obvious distress (perhaps as the result of an injury), try to contact a local animal rescue group. One way to find out if such a group exists in your area is to use The Wildlife Rehabilitation Directory.
The directory asks for your zip code and provides you with a list of animal rescue organizations within a given distance.