Frogs are Tricky
For some reason, they always sit in such a way that the light is on the other side of them from where you happen to be. And since they’re usually in the water, it’s impossible to get on their other side.
Your pop-up flash will fill in the dark areas and a telephoto lens will let you get close to them without scaring them away, but the third part is actually the tricky part:
they’re difficult to spot!