I have several tadpoles in a 10 gallon tank for about 2 months now. The are doing well. They started to grow legs, but then nothing else happened. I think they are bullfrogs. They are from a pond in Illinois. They are about 2 inches long, olive green in color with some spots. Please help me identify what kind of frogs these will be and I would appreciate any information on how long it can take for them to change into frogs. They have been kept indoors where the nights are kept warm.

