Frogs are seldom seen during the day, but easily discovered at night by their eye shine. In fact, it can be disturbing to see just how many of them there are around.
This is one of the most common snakes in NJ, inhabiting freshwater streams, ponds, lakes, swamps, marshes, and bogs throughout the state. This snake will likely retreat from you, but if you have to push your luck, this bad-tempered critter can give you a nasty non-venomous bite, and is likely to hold on for quite a while. All snakes are good swimmers, but this one actually likes the water.
You'll find these medium-sized turtles in any body of water. You will often find them sunning themselves on any convenient perch, watching you. Get too close, and they drop into the water. Rarely, you may encounter a released pet that is tame.
Ospreys, or "Fish Hawks", are surprisingly common, and can be found just about anywhere. You'll typically see them flying high over the water from a tree on one side to a tree on the other, occasionally diving down on some unlucky fish. Ospreys are usually seen alone, but mating pairs stay together, and I think young siblings stay together for a while as well. Ospreys are one of the biggest birds that you are likely to see. A single species has an almost worldwide distribution - pretty much everywhere except Australia.